/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/Problem13_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:11:58,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:11:58,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:11:58,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:11:58,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:11:58,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:11:58,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:11:58,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:11:58,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:11:58,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:11:58,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:11:58,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:11:58,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:11:58,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:11:58,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:11:58,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:11:58,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:11:58,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:11:58,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:11:58,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:11:58,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:11:58,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:11:58,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:11:58,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:11:58,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:11:58,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:11:58,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:11:58,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:11:58,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:11:58,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:11:58,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:11:58,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:11:58,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:11:58,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:11:58,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:11:58,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:11:58,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:11:58,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:11:58,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:11:58,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:11:58,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:11:58,256 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 23:11:58,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:11:58,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:11:58,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:11:58,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:11:58,315 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:11:58,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:11:58,315 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:11:58,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:11:58,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:11:58,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:11:58,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:11:58,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:11:58,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:11:58,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:11:58,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:11:58,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:11:58,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:11:58,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:11:58,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:11:58,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:11:58,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:11:58,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:11:58,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:11:58,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:11:58,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:11:58,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:11:58,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:11:58,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:11:58,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:11:58,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:11:58,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:11:58,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:11:58,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:11:58,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:11:58,865 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:11:58,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label36.c [2020-10-26 23:11:58,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bcf55523/c846ab37e23749feb7a17eff21f53222/FLAG936061618 [2020-10-26 23:12:00,085 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:12:00,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label36.c [2020-10-26 23:12:00,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bcf55523/c846ab37e23749feb7a17eff21f53222/FLAG936061618 [2020-10-26 23:12:00,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bcf55523/c846ab37e23749feb7a17eff21f53222 [2020-10-26 23:12:00,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:12:00,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:12:00,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:12:00,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:12:00,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:12:00,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:12:00" (1/1) ... [2020-10-26 23:12:00,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eaca5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:00, skipping insertion in model container [2020-10-26 23:12:00,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:12:00" (1/1) ... [2020-10-26 23:12:00,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:12:00,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:12:02,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:12:02,414 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:12:03,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:12:03,453 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:12:03,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03 WrapperNode [2020-10-26 23:12:03,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:12:03,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:12:03,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:12:03,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:12:03,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:03,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... [2020-10-26 23:12:04,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:12:04,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:12:04,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:12:04,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:12:04,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:12:04,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:12:04,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:12:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:12:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:12:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:12:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:12:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:12:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:12:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:12:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:12:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:12:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:12:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:12:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:12:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:12:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:12:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:12:04,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:12:04,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:12:04,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:12:14,688 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:12:14,689 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:12:14,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:14 BoogieIcfgContainer [2020-10-26 23:12:14,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:12:14,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:12:14,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:12:14,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:12:14,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:12:00" (1/3) ... [2020-10-26 23:12:14,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdc2269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:14, skipping insertion in model container [2020-10-26 23:12:14,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:03" (2/3) ... [2020-10-26 23:12:14,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdc2269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:14, skipping insertion in model container [2020-10-26 23:12:14,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:14" (3/3) ... [2020-10-26 23:12:14,713 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label36.c [2020-10-26 23:12:14,726 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:12:14,732 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:12:14,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:12:14,790 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:12:14,791 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:12:14,791 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:12:14,791 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:12:14,791 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:12:14,791 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:12:14,791 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:12:14,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:12:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:12:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 23:12:14,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:14,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:14,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:14,871 INFO L82 PathProgramCache]: Analyzing trace with hash -912604822, now seen corresponding path program 1 times [2020-10-26 23:12:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:14,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628882874] [2020-10-26 23:12:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:15,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:15,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 23:12:15,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:15,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-26 23:12:15,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:15,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:15,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:15,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 23:12:15,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 23:12:15,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:15,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:15,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:15,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:15,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 23:12:15,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:15,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:15,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:15,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:15,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:15,833 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 23:12:15,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628882874] [2020-10-26 23:12:15,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:15,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:12:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488587977] [2020-10-26 23:12:15,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:12:15,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:12:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:12:15,873 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:12:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:33,104 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-26 23:12:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:12:33,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-26 23:12:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:33,151 INFO L225 Difference]: With dead ends: 3123 [2020-10-26 23:12:33,151 INFO L226 Difference]: Without dead ends: 1936 [2020-10-26 23:12:33,172 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 23:12:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-26 23:12:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-26 23:12:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-26 23:12:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-26 23:12:33,411 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 18 [2020-10-26 23:12:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:33,411 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-26 23:12:33,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:12:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-26 23:12:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 23:12:33,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:33,422 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:12:33,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:12:33,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896069, now seen corresponding path program 1 times [2020-10-26 23:12:33,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:33,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304771234] [2020-10-26 23:12:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:35,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:12:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-26 23:12:35,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:12:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:35,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:35,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:35,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:35,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:12:35,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:35,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:35,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:35,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:12:35,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-26 23:12:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:12:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304771234] [2020-10-26 23:12:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:35,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310828515] [2020-10-26 23:12:35,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:35,853 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 7 states. [2020-10-26 23:13:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:05,693 INFO L93 Difference]: Finished difference Result 5594 states and 8645 transitions. [2020-10-26 23:13:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:13:05,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-26 23:13:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:05,725 INFO L225 Difference]: With dead ends: 5594 [2020-10-26 23:13:05,726 INFO L226 Difference]: Without dead ends: 3682 [2020-10-26 23:13:05,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:13:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2020-10-26 23:13:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3590. [2020-10-26 23:13:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3590 states. [2020-10-26 23:13:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5101 transitions. [2020-10-26 23:13:05,872 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5101 transitions. Word has length 94 [2020-10-26 23:13:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:05,873 INFO L481 AbstractCegarLoop]: Abstraction has 3590 states and 5101 transitions. [2020-10-26 23:13:05,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5101 transitions. [2020-10-26 23:13:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 23:13:05,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:05,877 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:13:05,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:13:05,877 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1521918978, now seen corresponding path program 1 times [2020-10-26 23:13:05,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:05,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224195249] [2020-10-26 23:13:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:06,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:07,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:07,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 23:13:07,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-26 23:13:07,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:07,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:07,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:07,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:07,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:07,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 23:13:07,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:07,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:07,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:07,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:13:07,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:07,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 23:13:07,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:13:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:07,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224195249] [2020-10-26 23:13:07,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:07,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:13:07,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854208523] [2020-10-26 23:13:07,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:07,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:07,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:07,775 INFO L87 Difference]: Start difference. First operand 3590 states and 5101 transitions. Second operand 7 states. [2020-10-26 23:13:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:29,050 INFO L93 Difference]: Finished difference Result 10840 states and 15567 transitions. [2020-10-26 23:13:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:13:29,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-26 23:13:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:29,108 INFO L225 Difference]: With dead ends: 10840 [2020-10-26 23:13:29,108 INFO L226 Difference]: Without dead ends: 7256 [2020-10-26 23:13:29,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2020-10-26 23:13:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 7126. [2020-10-26 23:13:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7126 states. [2020-10-26 23:13:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 9542 transitions. [2020-10-26 23:13:29,393 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 9542 transitions. Word has length 108 [2020-10-26 23:13:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:29,394 INFO L481 AbstractCegarLoop]: Abstraction has 7126 states and 9542 transitions. [2020-10-26 23:13:29,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 9542 transitions. [2020-10-26 23:13:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 23:13:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:29,406 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:13:29,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:13:29,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1716352226, now seen corresponding path program 1 times [2020-10-26 23:13:29,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:29,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130712769] [2020-10-26 23:13:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:29,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:31,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:31,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 23:13:31,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:31,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1753 [2020-10-26 23:13:31,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:13:31,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:31,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:31,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:31,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:31,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:31,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:31,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:13:31,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:31,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:31,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:31,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:31,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:31,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:31,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:31,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:13:31,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 23:13:31,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:31,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:31,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:31,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130712769] [2020-10-26 23:13:31,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:31,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:13:31,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916204386] [2020-10-26 23:13:31,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:31,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:31,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:31,825 INFO L87 Difference]: Start difference. First operand 7126 states and 9542 transitions. Second operand 7 states. [2020-10-26 23:13:31,972 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:13:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:57,532 INFO L93 Difference]: Finished difference Result 13710 states and 18385 transitions. [2020-10-26 23:13:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:13:57,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-10-26 23:13:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:57,593 INFO L225 Difference]: With dead ends: 13710 [2020-10-26 23:13:57,594 INFO L226 Difference]: Without dead ends: 9861 [2020-10-26 23:13:57,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:13:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9861 states. [2020-10-26 23:13:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9861 to 9741. [2020-10-26 23:13:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9741 states. [2020-10-26 23:13:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 12590 transitions. [2020-10-26 23:13:57,873 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 12590 transitions. Word has length 111 [2020-10-26 23:13:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:57,875 INFO L481 AbstractCegarLoop]: Abstraction has 9741 states and 12590 transitions. [2020-10-26 23:13:57,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 12590 transitions. [2020-10-26 23:13:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 23:13:57,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:57,882 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:13:57,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:13:57,883 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:57,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2048042041, now seen corresponding path program 1 times [2020-10-26 23:13:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:57,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868382274] [2020-10-26 23:13:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:57,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:58,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:58,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:13:58,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:58,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-26 23:13:58,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:13:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:13:58,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:58,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:58,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:58,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:58,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:13:58,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:58,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:58,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:59,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:59,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:13:59,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:59,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-26 23:13:59,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:59,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:13:59,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:13:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:13:59,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868382274] [2020-10-26 23:13:59,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:59,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:13:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640506749] [2020-10-26 23:13:59,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:13:59,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:13:59,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:13:59,240 INFO L87 Difference]: Start difference. First operand 9741 states and 12590 transitions. Second operand 6 states. [2020-10-26 23:14:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:34,132 INFO L93 Difference]: Finished difference Result 26665 states and 36514 transitions. [2020-10-26 23:14:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:14:34,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-10-26 23:14:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:34,215 INFO L225 Difference]: With dead ends: 26665 [2020-10-26 23:14:34,215 INFO L226 Difference]: Without dead ends: 17733 [2020-10-26 23:14:34,249 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 23:14:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17733 states. [2020-10-26 23:14:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17733 to 17540. [2020-10-26 23:14:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17540 states. [2020-10-26 23:14:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17540 states to 17540 states and 23184 transitions. [2020-10-26 23:14:34,746 INFO L78 Accepts]: Start accepts. Automaton has 17540 states and 23184 transitions. Word has length 118 [2020-10-26 23:14:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:34,747 INFO L481 AbstractCegarLoop]: Abstraction has 17540 states and 23184 transitions. [2020-10-26 23:14:34,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:14:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17540 states and 23184 transitions. [2020-10-26 23:14:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 23:14:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:34,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:34,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:14:34,752 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1326419849, now seen corresponding path program 1 times [2020-10-26 23:14:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:34,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180704038] [2020-10-26 23:14:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:35,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:36,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:36,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-26 23:14:36,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-26 23:14:36,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-26 23:14:36,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:36,475 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:14:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:36,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:36,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:36,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:36,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:14:36,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:36,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:36,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 23:14:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-26 23:14:36,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 23:14:36,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:37,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180704038] [2020-10-26 23:14:37,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:37,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:14:37,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114010233] [2020-10-26 23:14:37,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:37,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:37,340 INFO L87 Difference]: Start difference. First operand 17540 states and 23184 transitions. Second operand 7 states. [2020-10-26 23:14:37,503 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:15:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:11,157 INFO L93 Difference]: Finished difference Result 39343 states and 54437 transitions. [2020-10-26 23:15:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:15:11,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2020-10-26 23:15:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:11,263 INFO L225 Difference]: With dead ends: 39343 [2020-10-26 23:15:11,263 INFO L226 Difference]: Without dead ends: 22612 [2020-10-26 23:15:11,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:15:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2020-10-26 23:15:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 22306. [2020-10-26 23:15:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22306 states. [2020-10-26 23:15:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22306 states to 22306 states and 28904 transitions. [2020-10-26 23:15:12,017 INFO L78 Accepts]: Start accepts. Automaton has 22306 states and 28904 transitions. Word has length 177 [2020-10-26 23:15:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:12,018 INFO L481 AbstractCegarLoop]: Abstraction has 22306 states and 28904 transitions. [2020-10-26 23:15:12,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 22306 states and 28904 transitions. [2020-10-26 23:15:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 23:15:12,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:12,021 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:12,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:15:12,022 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash 824141709, now seen corresponding path program 1 times [2020-10-26 23:15:12,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:12,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513828254] [2020-10-26 23:15:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:14,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:14,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 23:15:14,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:15:14,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-26 23:15:14,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:15:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:14,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-26 23:15:14,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:14,405 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:15:14,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:14,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:14,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:14,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:14,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:14,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:14,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:14,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:15:14,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:14,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 23:15:14,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:15:14,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:14,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:15:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:14,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:14,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 23:15:14,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:14,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 23:15:14,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:15:14,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:15:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513828254] [2020-10-26 23:15:15,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:15,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:15:15,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806581582] [2020-10-26 23:15:15,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:15:15,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:15:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:15:15,100 INFO L87 Difference]: Start difference. First operand 22306 states and 28904 transitions. Second operand 8 states. [2020-10-26 23:15:15,288 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:15:19,700 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66