/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/Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:47:44,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:47:44,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:47:44,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:47:44,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:47:44,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:47:44,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:47:44,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:47:44,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:47:44,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:47:44,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:47:44,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:47:44,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:47:44,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:47:44,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:47:44,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:47:44,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:47:44,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:47:44,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:47:44,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:47:44,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:47:44,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:47:44,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:47:44,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:47:44,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:47:44,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:47:44,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:47:44,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:47:44,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:47:44,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:47:44,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:47:44,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:47:44,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:47:44,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:47:44,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:47:44,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:47:44,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:47:44,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:47:44,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:47:44,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:47:44,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:47:44,329 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 22:47:44,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:47:44,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:47:44,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:47:44,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:47:44,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:47:44,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:47:44,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:47:44,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:47:44,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:47:44,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:47:44,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:47:44,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:47:44,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:47:44,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:47:44,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:47:44,396 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:47:44,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:47:44,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:47:44,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:47:44,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:47:44,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:47:44,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:47:44,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:47:44,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:47:44,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:47:44,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:47:44,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:47:44,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:47:44,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:47:44,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:47:44,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:47:44,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:47:44,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:47:44,858 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:47:44,859 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:47:44,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label06.c [2020-10-26 22:47:44,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/132b3aae2/f068e5b60aa74876927fc644b0851cc9/FLAG402582f14 [2020-10-26 22:47:45,993 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:47:45,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label06.c [2020-10-26 22:47:46,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/132b3aae2/f068e5b60aa74876927fc644b0851cc9/FLAG402582f14 [2020-10-26 22:47:46,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/132b3aae2/f068e5b60aa74876927fc644b0851cc9 [2020-10-26 22:47:46,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:47:46,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:47:46,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:46,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:47:46,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:47:46,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:46" (1/1) ... [2020-10-26 22:47:46,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2468e284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:46, skipping insertion in model container [2020-10-26 22:47:46,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:46" (1/1) ... [2020-10-26 22:47:46,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:47:46,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:47:47,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:47,954 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:47:48,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:48,689 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:47:48,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48 WrapperNode [2020-10-26 22:47:48,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:48,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:47:48,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:47:48,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:47:48,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:48,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:48,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:48,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:48,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:48,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:49,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (1/1) ... [2020-10-26 22:47:49,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:47:49,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:47:49,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:47:49,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:47:49,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (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 22:47:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:47:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:47:49,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:47:49,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:47:49,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:47:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:47:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:47:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:47:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:47:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:47:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:47:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:47:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:47:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:47:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:47:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:47:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:47:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:47:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:47:55,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:47:55,170 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:47:55,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:47:55 BoogieIcfgContainer [2020-10-26 22:47:55,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:47:55,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:47:55,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:47:55,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:47:55,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:47:46" (1/3) ... [2020-10-26 22:47:55,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2bfc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:47:55, skipping insertion in model container [2020-10-26 22:47:55,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:48" (2/3) ... [2020-10-26 22:47:55,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2bfc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:47:55, skipping insertion in model container [2020-10-26 22:47:55,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:47:55" (3/3) ... [2020-10-26 22:47:55,191 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label06.c [2020-10-26 22:47:55,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:47:55,213 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:47:55,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:47:55,281 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:47:55,282 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:47:55,282 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:47:55,282 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:47:55,282 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:47:55,282 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:47:55,282 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:47:55,283 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:47:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:47:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 22:47:55,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:55,350 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] [2020-10-26 22:47:55,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1410422828, now seen corresponding path program 1 times [2020-10-26 22:47:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:55,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007201456] [2020-10-26 22:47:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:56,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:56,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 22:47:56,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-26 22:47:56,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:47:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 22:47:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:47:56,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:56,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:56,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:56,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 22:47:56,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:56,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:56,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:56,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:56,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:56,550 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 22:47:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007201456] [2020-10-26 22:47:56,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:47:56,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:47:56,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944514897] [2020-10-26 22:47:56,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:47:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:56,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:47:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:47:56,590 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:48:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:07,759 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:48:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:48:07,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-26 22:48:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:07,794 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:48:07,794 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:48:07,806 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 22:48:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:48:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:48:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:48:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2834 transitions. [2020-10-26 22:48:07,984 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2834 transitions. Word has length 30 [2020-10-26 22:48:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:07,985 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2834 transitions. [2020-10-26 22:48:07,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:48:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2834 transitions. [2020-10-26 22:48:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 22:48:07,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:07,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:07,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:48:07,994 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 580275254, now seen corresponding path program 1 times [2020-10-26 22:48:07,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750803132] [2020-10-26 22:48:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:08,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:09,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:09,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 22:48:09,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-26 22:48:09,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:48:09,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:48:09,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:09,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:09,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:09,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:09,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 22:48:09,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:09,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:09,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:09,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:09,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 22:48:09,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:09,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:09,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:09,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:48:09,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:09,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 22:48:09,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:09,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:48:09,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:48:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750803132] [2020-10-26 22:48:09,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:09,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:48:09,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655585720] [2020-10-26 22:48:09,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:09,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:09,875 INFO L87 Difference]: Start difference. First operand 1554 states and 2834 transitions. Second operand 7 states. [2020-10-26 22:48:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:23,822 INFO L93 Difference]: Finished difference Result 4740 states and 8695 transitions. [2020-10-26 22:48:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:48:23,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-26 22:48:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:23,845 INFO L225 Difference]: With dead ends: 4740 [2020-10-26 22:48:23,846 INFO L226 Difference]: Without dead ends: 3192 [2020-10-26 22:48:23,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 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 22:48:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-10-26 22:48:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3137. [2020-10-26 22:48:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3137 states. [2020-10-26 22:48:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 4988 transitions. [2020-10-26 22:48:23,979 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 4988 transitions. Word has length 103 [2020-10-26 22:48:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:23,980 INFO L481 AbstractCegarLoop]: Abstraction has 3137 states and 4988 transitions. [2020-10-26 22:48:23,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 4988 transitions. [2020-10-26 22:48:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 22:48:23,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:23,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:23,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:48:23,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1094666510, now seen corresponding path program 1 times [2020-10-26 22:48:23,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:23,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350887440] [2020-10-26 22:48:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:24,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:24,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:24,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:48:24,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-26 22:48:24,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:48:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 22:48:24,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:24,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:24,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:24,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:24,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:24,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:48:24,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:24,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:25,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:25,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:25,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:25,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:48:25,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:25,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:25,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:25,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:48:25,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:48:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350887440] [2020-10-26 22:48:25,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:48:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763590083] [2020-10-26 22:48:25,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:48:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:48:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:48:25,101 INFO L87 Difference]: Start difference. First operand 3137 states and 4988 transitions. Second operand 6 states. [2020-10-26 22:48:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:38,946 INFO L93 Difference]: Finished difference Result 9571 states and 15592 transitions. [2020-10-26 22:48:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:48:38,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-26 22:48:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:38,999 INFO L225 Difference]: With dead ends: 9571 [2020-10-26 22:48:38,999 INFO L226 Difference]: Without dead ends: 6440 [2020-10-26 22:48:39,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 22:48:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6440 states. [2020-10-26 22:48:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6440 to 6395. [2020-10-26 22:48:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-26 22:48:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 9126 transitions. [2020-10-26 22:48:39,276 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 9126 transitions. Word has length 105 [2020-10-26 22:48:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:39,279 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 9126 transitions. [2020-10-26 22:48:39,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:48:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 9126 transitions. [2020-10-26 22:48:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 22:48:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:39,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:39,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:48:39,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1361630050, now seen corresponding path program 1 times [2020-10-26 22:48:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:39,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248686546] [2020-10-26 22:48:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:39,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:40,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:40,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:48:40,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:40,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-26 22:48:40,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:40,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:40,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:40,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:48:40,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:40,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:40,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:40,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:40,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:40,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:40,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:40,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:48:40,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248686546] [2020-10-26 22:48:40,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:40,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:48:40,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850529279] [2020-10-26 22:48:40,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:40,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:40,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:40,963 INFO L87 Difference]: Start difference. First operand 6395 states and 9126 transitions. Second operand 7 states. [2020-10-26 22:48:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:58,643 INFO L93 Difference]: Finished difference Result 19689 states and 29227 transitions. [2020-10-26 22:48:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:48:58,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2020-10-26 22:48:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:58,742 INFO L225 Difference]: With dead ends: 19689 [2020-10-26 22:48:58,742 INFO L226 Difference]: Without dead ends: 13300 [2020-10-26 22:48:58,766 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 22:48:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2020-10-26 22:48:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 12251. [2020-10-26 22:48:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12251 states. [2020-10-26 22:48:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12251 states to 12251 states and 16967 transitions. [2020-10-26 22:48:59,265 INFO L78 Accepts]: Start accepts. Automaton has 12251 states and 16967 transitions. Word has length 115 [2020-10-26 22:48:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:59,267 INFO L481 AbstractCegarLoop]: Abstraction has 12251 states and 16967 transitions. [2020-10-26 22:48:59,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12251 states and 16967 transitions. [2020-10-26 22:48:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-26 22:48:59,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:59,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:59,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:48:59,273 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1102093594, now seen corresponding path program 1 times [2020-10-26 22:48:59,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:59,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825955534] [2020-10-26 22:48:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:59,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:00,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:00,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 22:49:00,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-26 22:49:00,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:49:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:49:00,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:00,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:00,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:00,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:00,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:49:00,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:00,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:00,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:01,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:01,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:49:01,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:01,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 22:49:01,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:49:01,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:01,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825955534] [2020-10-26 22:49:01,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:01,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083508501] [2020-10-26 22:49:01,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:01,235 INFO L87 Difference]: Start difference. First operand 12251 states and 16967 transitions. Second operand 7 states. [2020-10-26 22:49:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:23,142 INFO L93 Difference]: Finished difference Result 36268 states and 53131 transitions. [2020-10-26 22:49:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:49:23,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-26 22:49:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:23,282 INFO L225 Difference]: With dead ends: 36268 [2020-10-26 22:49:23,282 INFO L226 Difference]: Without dead ends: 24023 [2020-10-26 22:49:23,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:49:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24023 states. [2020-10-26 22:49:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24023 to 22272. [2020-10-26 22:49:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22272 states. [2020-10-26 22:49:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22272 states to 22272 states and 31837 transitions. [2020-10-26 22:49:24,230 INFO L78 Accepts]: Start accepts. Automaton has 22272 states and 31837 transitions. Word has length 143 [2020-10-26 22:49:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:24,232 INFO L481 AbstractCegarLoop]: Abstraction has 22272 states and 31837 transitions. [2020-10-26 22:49:24,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22272 states and 31837 transitions. [2020-10-26 22:49:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 22:49:24,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:24,240 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:49:24,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:49:24,241 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1455121528, now seen corresponding path program 1 times [2020-10-26 22:49:24,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:24,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898629170] [2020-10-26 22:49:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:24,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 22:49:25,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-26 22:49:25,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:49:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 22:49:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:25,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:25,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:25,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:25,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:49:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:25,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:49:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:25,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:26,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:26,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:49:26,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:26,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-26 22:49:26,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:26,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:49:26,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:49:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898629170] [2020-10-26 22:49:26,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:49:26,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:49:26,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233260878] [2020-10-26 22:49:26,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:26,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:26,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:26,352 INFO L87 Difference]: Start difference. First operand 22272 states and 31837 transitions. Second operand 7 states. [2020-10-26 22:49:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:55,491 INFO L93 Difference]: Finished difference Result 57038 states and 85830 transitions. [2020-10-26 22:49:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:49:55,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2020-10-26 22:49:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:55,649 INFO L225 Difference]: With dead ends: 57038 [2020-10-26 22:49:55,649 INFO L226 Difference]: Without dead ends: 31429 [2020-10-26 22:49:55,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31429 states. [2020-10-26 22:49:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31429 to 30555. [2020-10-26 22:49:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30555 states. [2020-10-26 22:49:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30555 states to 30555 states and 39745 transitions. [2020-10-26 22:49:56,849 INFO L78 Accepts]: Start accepts. Automaton has 30555 states and 39745 transitions. Word has length 218 [2020-10-26 22:49:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:56,850 INFO L481 AbstractCegarLoop]: Abstraction has 30555 states and 39745 transitions. [2020-10-26 22:49:56,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30555 states and 39745 transitions. [2020-10-26 22:49:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 22:49:56,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:56,855 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:49:56,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:49:56,856 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1484114144, now seen corresponding path program 1 times [2020-10-26 22:49:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444000485] [2020-10-26 22:49:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:56,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:57,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:59,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 22:49:59,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2494 [2020-10-26 22:49:59,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:49:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-26 22:49:59,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:59,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:59,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:59,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:49:59,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:59,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:49:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:59,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 22:49:59,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:59,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:49:59,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:49:59,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:49:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:00,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:00,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:50:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 92 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444000485] [2020-10-26 22:50:00,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:00,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:50:00,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951060527] [2020-10-26 22:50:00,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:50:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:50:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:50:00,205 INFO L87 Difference]: Start difference. First operand 30555 states and 39745 transitions. Second operand 6 states. [2020-10-26 22:50:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:21,580 INFO L93 Difference]: Finished difference Result 76023 states and 105175 transitions. [2020-10-26 22:50:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:50:21,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 250 [2020-10-26 22:50:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:21,811 INFO L225 Difference]: With dead ends: 76023 [2020-10-26 22:50:21,926 INFO L226 Difference]: Without dead ends: 44606 [2020-10-26 22:50:22,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 22:50:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44606 states. [2020-10-26 22:50:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44606 to 44381. [2020-10-26 22:50:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44381 states. [2020-10-26 22:50:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44381 states to 44381 states and 59526 transitions. [2020-10-26 22:50:24,101 INFO L78 Accepts]: Start accepts. Automaton has 44381 states and 59526 transitions. Word has length 250 [2020-10-26 22:50:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:24,103 INFO L481 AbstractCegarLoop]: Abstraction has 44381 states and 59526 transitions. [2020-10-26 22:50:24,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:50:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44381 states and 59526 transitions. [2020-10-26 22:50:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 22:50:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:24,114 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:50:24,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:50:24,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1465437758, now seen corresponding path program 1 times [2020-10-26 22:50:24,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:24,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473319824] [2020-10-26 22:50:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:24,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:27,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:27,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 22:50:27,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:27,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-26 22:50:27,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:50:27,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:27,509 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:27,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:27,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 22:50:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:50:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:27,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:27,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:27,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:27,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:50:27,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:50:27,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:28,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-26 22:50:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:28,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:28,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:28,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:50:28,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:28,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 22:50:28,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:28,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:28,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-26 22:50:28,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:28,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 44 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:28,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473319824] [2020-10-26 22:50:28,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:28,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292997269] [2020-10-26 22:50:28,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:50:28,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:28,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:50:28,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:28,614 INFO L87 Difference]: Start difference. First operand 44381 states and 59526 transitions. Second operand 7 states. [2020-10-26 22:50:28,779 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 22:50:31,998 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 22:50:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:46,336 INFO L93 Difference]: Finished difference Result 90543 states and 119832 transitions. [2020-10-26 22:50:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:50:46,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-26 22:50:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:46,530 INFO L225 Difference]: With dead ends: 90543 [2020-10-26 22:50:46,530 INFO L226 Difference]: Without dead ends: 46256 [2020-10-26 22:50:46,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:50:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46256 states. [2020-10-26 22:50:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46256 to 46074. [2020-10-26 22:50:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46074 states. [2020-10-26 22:50:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46074 states to 46074 states and 61781 transitions. [2020-10-26 22:50:48,478 INFO L78 Accepts]: Start accepts. Automaton has 46074 states and 61781 transitions. Word has length 251 [2020-10-26 22:50:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:48,478 INFO L481 AbstractCegarLoop]: Abstraction has 46074 states and 61781 transitions. [2020-10-26 22:50:48,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:50:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46074 states and 61781 transitions. [2020-10-26 22:50:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-26 22:50:48,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:48,484 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:50:48,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:50:48,485 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash -99732996, now seen corresponding path program 1 times [2020-10-26 22:50:48,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:48,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701950335] [2020-10-26 22:50:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:48,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:51,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:51,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2690 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-26 22:50:51,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:51,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:51,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:51,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:50:51,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:51,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:51,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:52,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:52,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:52,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-26 22:50:52,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 22:50:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:50:52,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:52,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:50:52,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:52,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 22:50:52,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:50:52,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:50:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-26 22:50:52,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701950335] [2020-10-26 22:50:52,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:52,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:52,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578123399] [2020-10-26 22:50:52,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:50:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:50:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:52,624 INFO L87 Difference]: Start difference. First operand 46074 states and 61781 transitions. Second operand 8 states. [2020-10-26 22:50:52,789 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:51:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:51:19,478 INFO L93 Difference]: Finished difference Result 111605 states and 155854 transitions. [2020-10-26 22:51:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:51:19,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 276 [2020-10-26 22:51:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:51:19,762 INFO L225 Difference]: With dead ends: 111605 [2020-10-26 22:51:19,762 INFO L226 Difference]: Without dead ends: 66304 [2020-10-26 22:51:20,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:51:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66304 states. [2020-10-26 22:51:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66304 to 61531. [2020-10-26 22:51:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61531 states. [2020-10-26 22:51:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61531 states to 61531 states and 80180 transitions. [2020-10-26 22:51:21,850 INFO L78 Accepts]: Start accepts. Automaton has 61531 states and 80180 transitions. Word has length 276 [2020-10-26 22:51:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:51:21,853 INFO L481 AbstractCegarLoop]: Abstraction has 61531 states and 80180 transitions. [2020-10-26 22:51:21,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:51:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61531 states and 80180 transitions. [2020-10-26 22:51:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-26 22:51:21,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:51:21,874 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:51:21,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:51:21,874 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:51:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:51:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash -753076738, now seen corresponding path program 1 times [2020-10-26 22:51:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:51:21,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032086583] [2020-10-26 22:51:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:51:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:22,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:25,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:25,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3808 [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:51:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:51:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:26,167 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:51:26,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:51:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:26,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:26,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:26,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:26,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:51:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:26,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:26,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:26,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:51:26,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:26,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 22:51:26,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:51:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:51:26,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:51:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:26,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:51:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 22:51:26,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:51:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:51:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:51:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:26,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-10-26 22:51:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:26,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:26,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:26,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 156 proven. 72 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-26 22:51:26,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032086583] [2020-10-26 22:51:26,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:51:26,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:51:26,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554537919] [2020-10-26 22:51:26,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:51:26,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:51:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:51:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:51:26,970 INFO L87 Difference]: Start difference. First operand 61531 states and 80180 transitions. Second operand 7 states.