/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem17_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:14:27,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:14:27,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:14:27,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:14:27,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:14:27,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:14:27,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:14:27,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:14:27,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:14:27,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:14:27,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:14:27,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:14:27,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:14:27,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:14:27,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:14:27,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:14:27,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:14:27,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:14:27,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:14:27,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:14:27,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:14:27,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:14:27,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:14:27,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:14:27,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:14:27,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:14:27,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:14:27,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:14:27,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:14:27,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:14:27,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:14:27,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:14:27,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:14:27,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:14:27,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:14:27,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:14:27,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:14:27,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:14:27,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:14:27,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:14:27,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:14:27,234 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 [2020-10-29 08:14:27,296 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:14:27,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:14:27,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:14:27,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:14:27,303 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:14:27,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:14:27,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:14:27,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:14:27,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:14:27,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:14:27,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:14:27,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:14:27,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:14:27,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:14:27,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:14:27,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:14:27,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:14:27,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:14:27,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:14:27,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:14:27,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:14:27,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:14:27,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:14:27,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:14:27,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:14:27,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:14:27,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:14:27,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:14:27,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:14:27,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:14:27,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:14:27,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:14:27,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:14:27,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:14:27,855 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:14:27,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label16.c [2020-10-29 08:14:27,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ea7fde3b/280d99745c684dbfb7eb8693ea4ec3b9/FLAG0fb5edb73 [2020-10-29 08:14:28,990 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:14:28,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label16.c [2020-10-29 08:14:29,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ea7fde3b/280d99745c684dbfb7eb8693ea4ec3b9/FLAG0fb5edb73 [2020-10-29 08:14:29,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ea7fde3b/280d99745c684dbfb7eb8693ea4ec3b9 [2020-10-29 08:14:29,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:14:29,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:14:29,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:14:29,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:14:29,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:14:29,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:14:29" (1/1) ... [2020-10-29 08:14:29,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b41489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:29, skipping insertion in model container [2020-10-29 08:14:29,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:14:29" (1/1) ... [2020-10-29 08:14:29,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:14:29,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:14:30,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:14:30,741 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:14:31,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:14:31,206 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:14:31,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31 WrapperNode [2020-10-29 08:14:31,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:14:31,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:14:31,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:14:31,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:14:31,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (1/1) ... [2020-10-29 08:14:31,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:14:31,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:14:31,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:14:31,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:14:31,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (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 [2020-10-29 08:14:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:14:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:14:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:14:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:14:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:14:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:14:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:14:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:14:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:14:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:14:31,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:14:31,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:14:31,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:14:31,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:14:31,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:14:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:14:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:14:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:14:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:14:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:14:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:14:41,288 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:14:41,288 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:14:41,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:14:41 BoogieIcfgContainer [2020-10-29 08:14:41,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:14:41,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:14:41,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:14:41,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:14:41,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:14:29" (1/3) ... [2020-10-29 08:14:41,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cb752f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:14:41, skipping insertion in model container [2020-10-29 08:14:41,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:14:31" (2/3) ... [2020-10-29 08:14:41,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cb752f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:14:41, skipping insertion in model container [2020-10-29 08:14:41,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:14:41" (3/3) ... [2020-10-29 08:14:41,302 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label16.c [2020-10-29 08:14:41,315 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:14:41,321 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:14:41,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:14:41,370 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:14:41,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:14:41,370 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:14:41,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:14:41,371 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:14:41,371 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:14:41,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:14:41,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:14:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:14:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 08:14:41,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:14:41,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:14:41,414 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:14:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:14:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash 911374562, now seen corresponding path program 1 times [2020-10-29 08:14:41,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:14:41,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956744056] [2020-10-29 08:14:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:14:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:14:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:42,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:14:42,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 08:14:42,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:14:42,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-29 08:14:42,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:14:42,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:14:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:14:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:14:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 08:14:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:14:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:14:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:14:42,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:42,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:14:42,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:14:42,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:14:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:14:42,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:14:42,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:14:42,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:14:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:14:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:14:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:14:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:14:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956744056] [2020-10-29 08:14:42,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:14:42,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:14:42,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356702458] [2020-10-29 08:14:42,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:14:42,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:14:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:14:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:14:42,510 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:14:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:14:56,103 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:14:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:14:56,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 08:14:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:14:56,154 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:14:56,154 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:14:56,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:14:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:14:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:14:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:14:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:14:56,303 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 32 [2020-10-29 08:14:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:14:56,304 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:14:56,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:14:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:14:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 08:14:56,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:14:56,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:14:56,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:14:56,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:14:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:14:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -402948670, now seen corresponding path program 1 times [2020-10-29 08:14:56,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:14:56,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407637420] [2020-10-29 08:14:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:14:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:14:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:57,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:14:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 08:14:57,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:14:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-29 08:14:57,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:14:57,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:14:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:14:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:14:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:14:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:14:57,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:14:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:14:57,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:57,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:14:57,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:14:57,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:14:57,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 08:14:57,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:14:57,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:14:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:14:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:14:57,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:14:57,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:14:57,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:14:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:14:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:14:58,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:14:58,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:14:58,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:14:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 08:14:58,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:14:58,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:14:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:14:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:14:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:14:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:14:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:14:58,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407637420] [2020-10-29 08:14:58,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:14:58,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:14:58,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518964426] [2020-10-29 08:14:58,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:14:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:14:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:14:58,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:14:58,288 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-29 08:15:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:15:11,020 INFO L93 Difference]: Finished difference Result 2448 states and 3891 transitions. [2020-10-29 08:15:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:15:11,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-29 08:15:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:15:11,036 INFO L225 Difference]: With dead ends: 2448 [2020-10-29 08:15:11,037 INFO L226 Difference]: Without dead ends: 1462 [2020-10-29 08:15:11,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:15:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-29 08:15:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1433. [2020-10-29 08:15:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 08:15:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-29 08:15:11,121 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 103 [2020-10-29 08:15:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:15:11,122 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-29 08:15:11,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:15:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-29 08:15:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 08:15:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:15:11,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:15:11,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:15:11,136 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:15:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:15:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1151467633, now seen corresponding path program 1 times [2020-10-29 08:15:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:15:11,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081924441] [2020-10-29 08:15:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:15:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:11,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:12,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:12,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 08:15:12,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:12,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-29 08:15:12,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:12,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:15:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:15:12,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 08:15:12,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:12,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:15:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:12,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:12,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:12,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:15:12,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:12,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 08:15:12,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:12,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:15:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:15:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:15:12,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:15:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:12,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:12,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:12,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:15:12,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:12,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-29 08:15:12,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:12,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:15:12,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:15:12,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:15:12,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:15:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081924441] [2020-10-29 08:15:12,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:15:12,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:15:12,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217383560] [2020-10-29 08:15:12,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:15:12,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:15:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:15:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:15:12,669 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 8 states. [2020-10-29 08:15:18,369 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-29 08:15:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:15:36,100 INFO L93 Difference]: Finished difference Result 3418 states and 4676 transitions. [2020-10-29 08:15:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 08:15:36,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-29 08:15:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:15:36,113 INFO L225 Difference]: With dead ends: 3418 [2020-10-29 08:15:36,113 INFO L226 Difference]: Without dead ends: 1971 [2020-10-29 08:15:36,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:15:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2020-10-29 08:15:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1926. [2020-10-29 08:15:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2020-10-29 08:15:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2464 transitions. [2020-10-29 08:15:36,187 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2464 transitions. Word has length 106 [2020-10-29 08:15:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:15:36,188 INFO L481 AbstractCegarLoop]: Abstraction has 1926 states and 2464 transitions. [2020-10-29 08:15:36,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:15:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2464 transitions. [2020-10-29 08:15:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-29 08:15:36,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:15:36,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:15:36,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:15:36,193 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:15:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:15:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 435562007, now seen corresponding path program 1 times [2020-10-29 08:15:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:15:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703431349] [2020-10-29 08:15:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:15:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:37,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-29 08:15:37,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:15:37,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1487 [2020-10-29 08:15:37,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:37,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:15:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:15:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 08:15:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:37,913 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:15:37,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:15:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:37,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:37,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:15:37,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:15:37,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:37,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:37,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:15:37,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:15:37,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:15:37,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:15:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:37,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:38,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:38,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:15:38,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:38,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-29 08:15:38,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:38,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:15:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:15:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:15:38,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:15:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:15:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:38,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:38,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 08:15:38,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:38,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-29 08:15:38,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:38,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:15:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:15:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 08:15:38,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:15:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703431349] [2020-10-29 08:15:38,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:15:38,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:15:38,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811851897] [2020-10-29 08:15:38,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:15:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:15:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:15:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:15:38,448 INFO L87 Difference]: Start difference. First operand 1926 states and 2464 transitions. Second operand 7 states. [2020-10-29 08:15:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:15:51,700 INFO L93 Difference]: Finished difference Result 4360 states and 5965 transitions. [2020-10-29 08:15:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:15:51,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2020-10-29 08:15:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:15:51,720 INFO L225 Difference]: With dead ends: 4360 [2020-10-29 08:15:51,721 INFO L226 Difference]: Without dead ends: 2875 [2020-10-29 08:15:51,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:15:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2020-10-29 08:15:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2852. [2020-10-29 08:15:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-10-29 08:15:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3662 transitions. [2020-10-29 08:15:51,837 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3662 transitions. Word has length 189 [2020-10-29 08:15:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:15:51,839 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 3662 transitions. [2020-10-29 08:15:51,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:15:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3662 transitions. [2020-10-29 08:15:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-29 08:15:51,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:15:51,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:15:51,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:15:51,843 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:15:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:15:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash 490606778, now seen corresponding path program 1 times [2020-10-29 08:15:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:15:51,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5213801] [2020-10-29 08:15:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:15:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:56,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:56,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-29 08:15:56,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:15:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4949 [2020-10-29 08:15:56,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:56,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:15:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:15:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:15:56,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:57,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:15:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:57,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:57,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:15:57,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:57,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:15:57,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:57,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:57,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:15:57,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:15:57,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:15:57,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:15:57,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:15:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:57,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:57,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:15:57,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-29 08:15:57,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:57,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:15:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:15:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:15:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:15:57,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:15:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:15:57,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:15:57,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:15:57,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:15:57,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:15:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-29 08:15:57,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:15:57,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:15:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:15:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:15:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:15:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:15:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:15:57,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5213801] [2020-10-29 08:15:57,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:15:57,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:15:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735129688] [2020-10-29 08:15:57,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:15:57,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:15:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:15:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:15:57,920 INFO L87 Difference]: Start difference. First operand 2852 states and 3662 transitions. Second operand 10 states. [2020-10-29 08:15:58,111 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-29 08:16:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:16:20,685 INFO L93 Difference]: Finished difference Result 5977 states and 8078 transitions. [2020-10-29 08:16:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 08:16:20,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 194 [2020-10-29 08:16:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:16:20,713 INFO L225 Difference]: With dead ends: 5977 [2020-10-29 08:16:20,713 INFO L226 Difference]: Without dead ends: 3566 [2020-10-29 08:16:20,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-29 08:16:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2020-10-29 08:16:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3321. [2020-10-29 08:16:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3321 states. [2020-10-29 08:16:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4182 transitions. [2020-10-29 08:16:20,909 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4182 transitions. Word has length 194 [2020-10-29 08:16:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:16:20,909 INFO L481 AbstractCegarLoop]: Abstraction has 3321 states and 4182 transitions. [2020-10-29 08:16:20,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:16:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4182 transitions. [2020-10-29 08:16:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-29 08:16:20,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:16:20,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:16:20,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:16:20,914 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:16:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:16:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash -703866640, now seen corresponding path program 1 times [2020-10-29 08:16:20,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:16:20,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144143289] [2020-10-29 08:16:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:16:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:21,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:25,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:25,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-29 08:16:25,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:16:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 08:16:25,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:25,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:16:25,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:16:25,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-29 08:16:25,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:26,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:16:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:26,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:26,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:26,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:16:26,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:26,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:16:26,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:26,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:16:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:16:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:16:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:26,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:16:26,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:16:26,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:26,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:16:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:26,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:26,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:16:26,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:16:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:16:26,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:16:26,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144143289] [2020-10-29 08:16:26,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:16:26,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:16:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441504933] [2020-10-29 08:16:26,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:16:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:16:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:16:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:16:26,777 INFO L87 Difference]: Start difference. First operand 3321 states and 4182 transitions. Second operand 5 states. [2020-10-29 08:16:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:16:42,567 INFO L93 Difference]: Finished difference Result 6214 states and 8279 transitions. [2020-10-29 08:16:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:16:42,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2020-10-29 08:16:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:16:42,589 INFO L225 Difference]: With dead ends: 6214 [2020-10-29 08:16:42,589 INFO L226 Difference]: Without dead ends: 3769 [2020-10-29 08:16:42,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:16:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2020-10-29 08:16:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3756. [2020-10-29 08:16:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3756 states. [2020-10-29 08:16:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3756 states to 3756 states and 4812 transitions. [2020-10-29 08:16:42,704 INFO L78 Accepts]: Start accepts. Automaton has 3756 states and 4812 transitions. Word has length 205 [2020-10-29 08:16:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:16:42,705 INFO L481 AbstractCegarLoop]: Abstraction has 3756 states and 4812 transitions. [2020-10-29 08:16:42,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:16:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3756 states and 4812 transitions. [2020-10-29 08:16:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-29 08:16:42,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:16:42,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:16:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:16:42,712 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:16:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:16:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1553261949, now seen corresponding path program 1 times [2020-10-29 08:16:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:16:42,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003454088] [2020-10-29 08:16:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:16:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:42,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:46,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:46,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:47,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:47,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-29 08:16:47,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 08:16:47,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 08:16:47,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:47,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:16:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:16:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-29 08:16:47,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:47,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:16:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:47,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:47,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:47,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:16:47,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:16:47,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:47,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:16:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:16:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:16:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:16:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:48,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:16:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:48,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:16:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:16:48,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:16:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:16:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-29 08:16:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:16:48,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:16:48,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:16:48,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 215 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:16:48,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003454088] [2020-10-29 08:16:48,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:16:48,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:16:48,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494315630] [2020-10-29 08:16:48,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:16:48,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:16:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:16:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:16:48,619 INFO L87 Difference]: Start difference. First operand 3756 states and 4812 transitions. Second operand 7 states. [2020-10-29 08:16:49,353 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:17:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:17:15,235 INFO L93 Difference]: Finished difference Result 8720 states and 11704 transitions. [2020-10-29 08:17:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:17:15,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 268 [2020-10-29 08:17:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:17:15,267 INFO L225 Difference]: With dead ends: 8720 [2020-10-29 08:17:15,267 INFO L226 Difference]: Without dead ends: 5840 [2020-10-29 08:17:15,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:17:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2020-10-29 08:17:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5680. [2020-10-29 08:17:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5680 states. [2020-10-29 08:17:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 7098 transitions. [2020-10-29 08:17:15,470 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 7098 transitions. Word has length 268 [2020-10-29 08:17:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:17:15,471 INFO L481 AbstractCegarLoop]: Abstraction has 5680 states and 7098 transitions. [2020-10-29 08:17:15,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:17:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 7098 transitions. [2020-10-29 08:17:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-29 08:17:15,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:17:15,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:17:15,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:17:15,478 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:17:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:17:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2055450315, now seen corresponding path program 1 times [2020-10-29 08:17:15,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:17:15,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645307162] [2020-10-29 08:17:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:17:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:15,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:17,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:20,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:20,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-29 08:17:20,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:17:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 08:17:20,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:20,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:17:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:17:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-29 08:17:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:17:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:20,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:20,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:17:20,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:20,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 08:17:20,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:20,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:17:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:17:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:17:20,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:17:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:20,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:20,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:17:20,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:20,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-29 08:17:20,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:20,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:17:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:17:20,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:21,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:17:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:21,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:21,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:17:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-29 08:17:21,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:21,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:17:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:17:21,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:21,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-29 08:17:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:21,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:21,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:17:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:17:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 148 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:17:21,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645307162] [2020-10-29 08:17:21,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:17:21,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:17:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465936957] [2020-10-29 08:17:21,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:17:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:17:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:17:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:17:21,335 INFO L87 Difference]: Start difference. First operand 5680 states and 7098 transitions. Second operand 10 states. [2020-10-29 08:17:21,542 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-29 08:17:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:17:52,747 INFO L93 Difference]: Finished difference Result 15504 states and 21263 transitions. [2020-10-29 08:17:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 08:17:52,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 272 [2020-10-29 08:17:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:17:52,803 INFO L225 Difference]: With dead ends: 15504 [2020-10-29 08:17:52,803 INFO L226 Difference]: Without dead ends: 9341 [2020-10-29 08:17:52,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-29 08:17:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-10-29 08:17:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 8513. [2020-10-29 08:17:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8513 states. [2020-10-29 08:17:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8513 states to 8513 states and 10095 transitions. [2020-10-29 08:17:53,088 INFO L78 Accepts]: Start accepts. Automaton has 8513 states and 10095 transitions. Word has length 272 [2020-10-29 08:17:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:17:53,089 INFO L481 AbstractCegarLoop]: Abstraction has 8513 states and 10095 transitions. [2020-10-29 08:17:53,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:17:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8513 states and 10095 transitions. [2020-10-29 08:17:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-29 08:17:53,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:17:53,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 08:17:53,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:17:53,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:17:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:17:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1108083188, now seen corresponding path program 1 times [2020-10-29 08:17:53,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:17:53,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056393499] [2020-10-29 08:17:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:17:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:53,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:54,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:55,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:55,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:17:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 283 [2020-10-29 08:17:55,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:55,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:17:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:55,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:17:55,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 08:17:55,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:17:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:17:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:17:55,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:55,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:17:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:56,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:56,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:17:56,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-29 08:17:56,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:56,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:56,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:17:56,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:56,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:17:56,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:17:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:56,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:56,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:17:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:17:56,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:56,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:17:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:56,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:56,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:17:56,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 08:17:56,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:56,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:17:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:17:56,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-29 08:17:56,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056393499] [2020-10-29 08:17:56,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:17:56,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:17:56,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349454134] [2020-10-29 08:17:56,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:17:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:17:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:17:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:17:56,533 INFO L87 Difference]: Start difference. First operand 8513 states and 10095 transitions. Second operand 9 states. [2020-10-29 08:17:56,697 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:18:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:18:23,170 INFO L93 Difference]: Finished difference Result 20146 states and 26747 transitions. [2020-10-29 08:18:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 08:18:23,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 276 [2020-10-29 08:18:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:18:23,229 INFO L225 Difference]: With dead ends: 20146 [2020-10-29 08:18:23,229 INFO L226 Difference]: Without dead ends: 11592 [2020-10-29 08:18:23,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 08:18:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11592 states.