/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:41:18,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:41:18,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:41:18,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:41:18,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:41:18,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:41:18,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:41:18,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:41:18,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:41:18,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:41:18,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:41:18,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:41:18,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:41:18,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:41:18,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:41:18,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:41:18,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:41:18,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:41:18,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:41:18,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:41:18,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:41:18,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:41:18,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:41:18,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:41:18,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:41:18,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:41:18,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:41:18,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:41:18,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:41:18,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:41:18,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:41:18,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:41:18,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:41:18,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:41:18,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:41:18,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:41:18,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:41:18,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:41:18,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:41:18,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:41:18,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:41:18,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:41:18,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:41:18,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:41:18,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:41:18,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:41:18,321 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:41:18,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:41:18,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:41:18,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:41:18,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:41:18,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:41:18,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:41:18,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:41:18,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:41:18,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:41:18,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:41:18,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:41:18,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:41:18,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:41:18,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:41:18,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:41:18,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:41:18,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:18,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:41:18,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:41:18,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:41:18,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:41:18,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:41:18,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:41:18,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:41:18,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:41:18,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:41:18,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:41:18,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:41:18,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:41:18,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:41:18,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02.c [2020-10-26 20:41:18,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12e1a6ff/77fd9436391445069570cb1613421316/FLAGaf7ada390 [2020-10-26 20:41:19,758 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:41:19,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label02.c [2020-10-26 20:41:19,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12e1a6ff/77fd9436391445069570cb1613421316/FLAGaf7ada390 [2020-10-26 20:41:19,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12e1a6ff/77fd9436391445069570cb1613421316 [2020-10-26 20:41:19,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:41:19,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:41:19,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:19,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:41:19,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:41:19,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:19" (1/1) ... [2020-10-26 20:41:19,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f765300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:19, skipping insertion in model container [2020-10-26 20:41:19,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:19" (1/1) ... [2020-10-26 20:41:19,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:41:20,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:41:21,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:21,041 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:41:21,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:21,508 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:41:21,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21 WrapperNode [2020-10-26 20:41:21,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:21,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:41:21,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:41:21,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:41:21,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... [2020-10-26 20:41:21,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:41:21,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:41:21,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:41:21,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:41:21,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:21,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:41:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:41:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:41:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:41:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:41:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:41:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:41:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:41:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:41:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:41:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:41:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:41:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:41:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:41:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:41:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:41:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:41:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:41:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:41:24,380 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:41:24,381 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:41:24,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:24 BoogieIcfgContainer [2020-10-26 20:41:24,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:41:24,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:41:24,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:41:24,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:41:24,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:41:19" (1/3) ... [2020-10-26 20:41:24,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f4fba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:24, skipping insertion in model container [2020-10-26 20:41:24,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:21" (2/3) ... [2020-10-26 20:41:24,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f4fba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:24, skipping insertion in model container [2020-10-26 20:41:24,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:24" (3/3) ... [2020-10-26 20:41:24,393 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label02.c [2020-10-26 20:41:24,407 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:41:24,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:41:24,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:41:24,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:41:24,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:41:24,461 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:41:24,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:41:24,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:41:24,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:41:24,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:41:24,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:41:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:41:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-26 20:41:24,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:24,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:41:24,509 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1164850036, now seen corresponding path program 1 times [2020-10-26 20:41:24,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:24,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024069437] [2020-10-26 20:41:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:25,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:26,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:29,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:29,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 20:41:29,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:41:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 20:41:29,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:29,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:41:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:41:29,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:41:31,268 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-26 20:41:31,498 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-26 20:41:32,122 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:32,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:32,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:32,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:32,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 20:41:32,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:41:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:41:33,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024069437] [2020-10-26 20:41:33,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:41:33,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:41:33,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509955055] [2020-10-26 20:41:33,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:41:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:33,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:41:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:41:33,105 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:41:33,724 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:41:34,781 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:41:35,841 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:41:36,966 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:41:38,758 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:41:40,834 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:41:43,020 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:41:47,160 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:41:49,019 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 235 DAG size of output: 199 [2020-10-26 20:41:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:41:52,362 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:41:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:41:52,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 211 [2020-10-26 20:41:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:41:52,391 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:41:52,391 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:41:52,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:41:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:41:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:41:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:41:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:41:52,534 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 211 [2020-10-26 20:41:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:41:52,538 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:41:52,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:41:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:41:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 20:41:52,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:52,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:41:52,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:41:52,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1702415513, now seen corresponding path program 1 times [2020-10-26 20:41:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:52,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840872506] [2020-10-26 20:41:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:52,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:57,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:57,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-26 20:41:57,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:41:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:41:57,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:41:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-26 20:41:57,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:41:58,325 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:58,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:58,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:58,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:58,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:41:58,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:58,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:58,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:58,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:41:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:58,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:41:58,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:41:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:41:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:41:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:41:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:41:58,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840872506] [2020-10-26 20:41:58,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:41:58,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:41:58,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114127556] [2020-10-26 20:41:58,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:41:58,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:41:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:41:58,712 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 7 states. [2020-10-26 20:41:58,987 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:02,569 INFO L93 Difference]: Finished difference Result 842 states and 1306 transitions. [2020-10-26 20:42:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:42:02,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 222 [2020-10-26 20:42:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:02,578 INFO L225 Difference]: With dead ends: 842 [2020-10-26 20:42:02,579 INFO L226 Difference]: Without dead ends: 598 [2020-10-26 20:42:02,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-10-26 20:42:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2020-10-26 20:42:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-26 20:42:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 856 transitions. [2020-10-26 20:42:02,634 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 856 transitions. Word has length 222 [2020-10-26 20:42:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:02,635 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 856 transitions. [2020-10-26 20:42:02,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 856 transitions. [2020-10-26 20:42:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 20:42:02,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:02,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:02,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:42:02,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2057278224, now seen corresponding path program 1 times [2020-10-26 20:42:02,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:02,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774784149] [2020-10-26 20:42:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:02,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:07,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:07,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 20:42:07,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:42:07,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:42:07,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:42:07,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:08,073 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:08,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:08,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:08,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:08,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:08,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:08,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:42:08,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:08,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:08,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:08,260 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:42:08,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:08,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:08,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:08,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:08,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:08,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:42:08,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:08,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:08,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:08,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:08,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:42:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:08,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:08,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:08,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:42:08,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:42:08,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:08,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:42:08,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:08,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774784149] [2020-10-26 20:42:08,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:08,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:08,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752687475] [2020-10-26 20:42:08,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:08,558 INFO L87 Difference]: Start difference. First operand 595 states and 856 transitions. Second operand 8 states. [2020-10-26 20:42:08,832 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:12,794 INFO L93 Difference]: Finished difference Result 1571 states and 2368 transitions. [2020-10-26 20:42:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:12,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 231 [2020-10-26 20:42:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:12,803 INFO L225 Difference]: With dead ends: 1571 [2020-10-26 20:42:12,803 INFO L226 Difference]: Without dead ends: 1097 [2020-10-26 20:42:12,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:42:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2020-10-26 20:42:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1076. [2020-10-26 20:42:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-10-26 20:42:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1589 transitions. [2020-10-26 20:42:12,866 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1589 transitions. Word has length 231 [2020-10-26 20:42:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:12,866 INFO L481 AbstractCegarLoop]: Abstraction has 1076 states and 1589 transitions. [2020-10-26 20:42:12,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1589 transitions. [2020-10-26 20:42:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 20:42:12,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:12,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:12,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:42:12,872 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1713374149, now seen corresponding path program 1 times [2020-10-26 20:42:12,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:12,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723163324] [2020-10-26 20:42:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-26 20:42:15,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-26 20:42:15,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:15,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-26 20:42:15,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:15,558 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:15,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:15,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:15,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:15,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:15,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 20:42:15,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:15,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723163324] [2020-10-26 20:42:15,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:15,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:15,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199330293] [2020-10-26 20:42:15,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:15,967 INFO L87 Difference]: Start difference. First operand 1076 states and 1589 transitions. Second operand 6 states. [2020-10-26 20:42:16,223 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:19,583 INFO L93 Difference]: Finished difference Result 2937 states and 4504 transitions. [2020-10-26 20:42:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:42:19,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2020-10-26 20:42:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:19,601 INFO L225 Difference]: With dead ends: 2937 [2020-10-26 20:42:19,601 INFO L226 Difference]: Without dead ends: 1982 [2020-10-26 20:42:19,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2020-10-26 20:42:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1942. [2020-10-26 20:42:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1942 states. [2020-10-26 20:42:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2896 transitions. [2020-10-26 20:42:19,688 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2896 transitions. Word has length 232 [2020-10-26 20:42:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:19,691 INFO L481 AbstractCegarLoop]: Abstraction has 1942 states and 2896 transitions. [2020-10-26 20:42:19,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2896 transitions. [2020-10-26 20:42:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-26 20:42:19,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:19,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:19,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:42:19,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1983907776, now seen corresponding path program 1 times [2020-10-26 20:42:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:19,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550895962] [2020-10-26 20:42:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:21,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:22,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:22,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 20:42:22,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:42:22,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2948 [2020-10-26 20:42:22,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:42:22,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:22,986 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:22,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:23,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:23,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:23,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:23,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:23,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550895962] [2020-10-26 20:42:23,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:23,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:23,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053435339] [2020-10-26 20:42:23,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:23,317 INFO L87 Difference]: Start difference. First operand 1942 states and 2896 transitions. Second operand 7 states. [2020-10-26 20:42:23,680 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:42:24,053 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:29,263 INFO L93 Difference]: Finished difference Result 6478 states and 10484 transitions. [2020-10-26 20:42:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:42:29,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 243 [2020-10-26 20:42:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:29,304 INFO L225 Difference]: With dead ends: 6478 [2020-10-26 20:42:29,305 INFO L226 Difference]: Without dead ends: 4657 [2020-10-26 20:42:29,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2020-10-26 20:42:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4581. [2020-10-26 20:42:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4581 states. [2020-10-26 20:42:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 6675 transitions. [2020-10-26 20:42:29,523 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 6675 transitions. Word has length 243 [2020-10-26 20:42:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:29,523 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 6675 transitions. [2020-10-26 20:42:29,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 6675 transitions. [2020-10-26 20:42:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 20:42:29,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:29,543 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:29,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:42:29,543 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash 708613836, now seen corresponding path program 1 times [2020-10-26 20:42:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:29,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092955394] [2020-10-26 20:42:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:30,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:33,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 20:42:33,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:33,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4329 [2020-10-26 20:42:33,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:33,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:33,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:33,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:42:33,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:34,216 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:34,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:34,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:34,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:34,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:34,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:34,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:34,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:34,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:34,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 20:42:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:34,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:34,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:42:34,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:34,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:42:34,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:42:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:42:34,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092955394] [2020-10-26 20:42:34,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:34,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:42:34,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896898958] [2020-10-26 20:42:34,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:34,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:34,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:34,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:34,734 INFO L87 Difference]: Start difference. First operand 4581 states and 6675 transitions. Second operand 7 states. [2020-10-26 20:42:35,014 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:37,148 INFO L93 Difference]: Finished difference Result 8967 states and 13228 transitions. [2020-10-26 20:42:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:42:37,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2020-10-26 20:42:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:37,174 INFO L225 Difference]: With dead ends: 8967 [2020-10-26 20:42:37,174 INFO L226 Difference]: Without dead ends: 4507 [2020-10-26 20:42:37,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:42:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2020-10-26 20:42:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 4503. [2020-10-26 20:42:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4503 states. [2020-10-26 20:42:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 6370 transitions. [2020-10-26 20:42:37,336 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 6370 transitions. Word has length 249 [2020-10-26 20:42:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:37,336 INFO L481 AbstractCegarLoop]: Abstraction has 4503 states and 6370 transitions. [2020-10-26 20:42:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 6370 transitions. [2020-10-26 20:42:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 20:42:37,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:37,354 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:37,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:42:37,354 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:37,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1570822380, now seen corresponding path program 1 times [2020-10-26 20:42:37,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:37,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739442747] [2020-10-26 20:42:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:41,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:42:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,710 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:42,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:42,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:42:42,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:42,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:42,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:42:42,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:42,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:42:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:42,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:42:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:42,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 20:42:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739442747] [2020-10-26 20:42:43,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:43,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:43,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526239792] [2020-10-26 20:42:43,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:42:43,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:42:43,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:42:43,065 INFO L87 Difference]: Start difference. First operand 4503 states and 6370 transitions. Second operand 5 states. [2020-10-26 20:42:43,331 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:44,979 INFO L93 Difference]: Finished difference Result 8032 states and 11432 transitions. [2020-10-26 20:42:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:42:44,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-10-26 20:42:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:45,006 INFO L225 Difference]: With dead ends: 8032 [2020-10-26 20:42:45,006 INFO L226 Difference]: Without dead ends: 4501 [2020-10-26 20:42:45,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2020-10-26 20:42:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 4501. [2020-10-26 20:42:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2020-10-26 20:42:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 6366 transitions. [2020-10-26 20:42:45,144 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 6366 transitions. Word has length 253 [2020-10-26 20:42:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:45,145 INFO L481 AbstractCegarLoop]: Abstraction has 4501 states and 6366 transitions. [2020-10-26 20:42:45,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:42:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 6366 transitions. [2020-10-26 20:42:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-26 20:42:45,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:45,162 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:45,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:42:45,162 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1515496988, now seen corresponding path program 1 times [2020-10-26 20:42:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:45,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305560620] [2020-10-26 20:42:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:45,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:50,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-26 20:42:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:50,659 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:50,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:50,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:50,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:50,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:50,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:50,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:50,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:50,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:42:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:51,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:51,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:42:51,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:51,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 20:42:51,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:42:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:42:51,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:42:51,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305560620] [2020-10-26 20:42:51,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:51,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:51,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632040042] [2020-10-26 20:42:51,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:51,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:51,374 INFO L87 Difference]: Start difference. First operand 4501 states and 6366 transitions. Second operand 8 states. [2020-10-26 20:42:51,660 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:42:52,234 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:42:55,929 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:42:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:58,375 INFO L93 Difference]: Finished difference Result 12751 states and 18943 transitions. [2020-10-26 20:42:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:42:58,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 257 [2020-10-26 20:42:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:58,430 INFO L225 Difference]: With dead ends: 12751 [2020-10-26 20:42:58,430 INFO L226 Difference]: Without dead ends: 8082 [2020-10-26 20:42:58,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:42:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2020-10-26 20:42:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7991. [2020-10-26 20:42:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7991 states. [2020-10-26 20:42:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7991 states to 7991 states and 11004 transitions. [2020-10-26 20:42:58,702 INFO L78 Accepts]: Start accepts. Automaton has 7991 states and 11004 transitions. Word has length 257 [2020-10-26 20:42:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:58,702 INFO L481 AbstractCegarLoop]: Abstraction has 7991 states and 11004 transitions. [2020-10-26 20:42:58,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 7991 states and 11004 transitions. [2020-10-26 20:42:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 20:42:58,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:58,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:58,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:42:58,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2123454660, now seen corresponding path program 1 times [2020-10-26 20:42:58,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:58,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248366433] [2020-10-26 20:42:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:02,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:03,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:03,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 20:43:03,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:03,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:43:03,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:03,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,147 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:04,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:04,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:04,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:43:04,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:04,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:04,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:43:04,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 20:43:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:43:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:04,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 20:43:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:04,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:04,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:43:04,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248366433] [2020-10-26 20:43:04,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:04,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540975367] [2020-10-26 20:43:04,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:04,708 INFO L87 Difference]: Start difference. First operand 7991 states and 11004 transitions. Second operand 8 states. [2020-10-26 20:43:04,986 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:43:05,771 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:43:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:08,304 INFO L93 Difference]: Finished difference Result 17884 states and 24945 transitions. [2020-10-26 20:43:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:43:08,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 266 [2020-10-26 20:43:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:08,342 INFO L225 Difference]: With dead ends: 17884 [2020-10-26 20:43:08,343 INFO L226 Difference]: Without dead ends: 10002 [2020-10-26 20:43:08,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:43:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2020-10-26 20:43:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 9834. [2020-10-26 20:43:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9834 states. [2020-10-26 20:43:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 13154 transitions. [2020-10-26 20:43:08,615 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 13154 transitions. Word has length 266 [2020-10-26 20:43:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:08,615 INFO L481 AbstractCegarLoop]: Abstraction has 9834 states and 13154 transitions. [2020-10-26 20:43:08,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 13154 transitions. [2020-10-26 20:43:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:43:08,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:08,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:08,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:43:08,639 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1686232812, now seen corresponding path program 1 times [2020-10-26 20:43:08,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:08,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358108019] [2020-10-26 20:43:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:09,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:13,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:13,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 20:43:13,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:43:13,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:14,003 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:14,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:14,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:14,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:14,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:43:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:43:14,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:14,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:43:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:43:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:14,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 20:43:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:43:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 53 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 20:43:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358108019] [2020-10-26 20:43:14,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:14,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:14,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882199887] [2020-10-26 20:43:14,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:14,470 INFO L87 Difference]: Start difference. First operand 9834 states and 13154 transitions. Second operand 7 states. [2020-10-26 20:43:14,720 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:43:15,463 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:43:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:17,930 INFO L93 Difference]: Finished difference Result 20721 states and 28737 transitions. [2020-10-26 20:43:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:17,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 20:43:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:17,985 INFO L225 Difference]: With dead ends: 20721 [2020-10-26 20:43:17,986 INFO L226 Difference]: Without dead ends: 13532 [2020-10-26 20:43:18,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2020-10-26 20:43:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 13390. [2020-10-26 20:43:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13390 states. [2020-10-26 20:43:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13390 states to 13390 states and 18038 transitions. [2020-10-26 20:43:18,382 INFO L78 Accepts]: Start accepts. Automaton has 13390 states and 18038 transitions. Word has length 273 [2020-10-26 20:43:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:18,382 INFO L481 AbstractCegarLoop]: Abstraction has 13390 states and 18038 transitions. [2020-10-26 20:43:18,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 13390 states and 18038 transitions. [2020-10-26 20:43:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-26 20:43:18,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:18,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:18,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:43:18,416 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash -892539382, now seen corresponding path program 1 times [2020-10-26 20:43:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215287701] [2020-10-26 20:43:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:18,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:43:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:23,941 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:23,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:23,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:23,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:24,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:24,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:24,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:43:24,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 20:43:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:43:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 20:43:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:24,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 93 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 20:43:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215287701] [2020-10-26 20:43:24,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:24,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532579937] [2020-10-26 20:43:24,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:24,573 INFO L87 Difference]: Start difference. First operand 13390 states and 18038 transitions. Second operand 7 states. [2020-10-26 20:43:24,819 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:27,693 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:28,389 INFO L93 Difference]: Finished difference Result 37375 states and 53275 transitions. [2020-10-26 20:43:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:28,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 307 [2020-10-26 20:43:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:28,488 INFO L225 Difference]: With dead ends: 37375 [2020-10-26 20:43:28,488 INFO L226 Difference]: Without dead ends: 26194 [2020-10-26 20:43:28,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2020-10-26 20:43:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 23209. [2020-10-26 20:43:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23209 states. [2020-10-26 20:43:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23209 states to 23209 states and 30980 transitions. [2020-10-26 20:43:29,160 INFO L78 Accepts]: Start accepts. Automaton has 23209 states and 30980 transitions. Word has length 307 [2020-10-26 20:43:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:29,160 INFO L481 AbstractCegarLoop]: Abstraction has 23209 states and 30980 transitions. [2020-10-26 20:43:29,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23209 states and 30980 transitions. [2020-10-26 20:43:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-26 20:43:29,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:29,209 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:29,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:43:29,210 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash -844561042, now seen corresponding path program 1 times [2020-10-26 20:43:29,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:29,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842824905] [2020-10-26 20:43:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:43:34,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:34,574 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:34,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:34,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:34,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:34,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:34,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:34,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:34,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:34,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:34,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:43:34,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:34,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:43:34,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:34,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:34,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:43:34,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:35,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 20:43:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:35,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:35,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:43:35,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:35,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:43:35,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:43:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:35,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 20:43:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:35,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:35,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 102 proven. 38 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:43:35,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842824905] [2020-10-26 20:43:35,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:35,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987580834] [2020-10-26 20:43:35,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:35,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:35,208 INFO L87 Difference]: Start difference. First operand 23209 states and 30980 transitions. Second operand 8 states. [2020-10-26 20:43:35,495 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:36,375 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:39,131 INFO L93 Difference]: Finished difference Result 47772 states and 64985 transitions. [2020-10-26 20:43:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:43:39,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 316 [2020-10-26 20:43:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:39,235 INFO L225 Difference]: With dead ends: 47772 [2020-10-26 20:43:39,236 INFO L226 Difference]: Without dead ends: 28909 [2020-10-26 20:43:39,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:43:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28909 states. [2020-10-26 20:43:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28909 to 28729. [2020-10-26 20:43:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28729 states. [2020-10-26 20:43:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28729 states to 28729 states and 38222 transitions. [2020-10-26 20:43:39,937 INFO L78 Accepts]: Start accepts. Automaton has 28729 states and 38222 transitions. Word has length 316 [2020-10-26 20:43:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:39,938 INFO L481 AbstractCegarLoop]: Abstraction has 28729 states and 38222 transitions. [2020-10-26 20:43:39,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 28729 states and 38222 transitions. [2020-10-26 20:43:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-26 20:43:39,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:39,985 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:39,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:43:39,986 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash 429726499, now seen corresponding path program 1 times [2020-10-26 20:43:39,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:39,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379629485] [2020-10-26 20:43:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:41,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:43:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:45,459 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:45,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:45,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:45,705 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:43:45,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:45,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:45,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:43:45,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 20:43:45,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:43:45,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:45,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:43:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:43:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:43:45,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:43:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-26 20:43:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:46,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:46,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:43:46,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:43:46,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379629485] [2020-10-26 20:43:46,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911944140] [2020-10-26 20:43:46,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:46,228 INFO L87 Difference]: Start difference. First operand 28729 states and 38222 transitions. Second operand 7 states. [2020-10-26 20:43:47,129 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:47,907 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:50,476 INFO L93 Difference]: Finished difference Result 73122 states and 101781 transitions. [2020-10-26 20:43:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:50,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 341 [2020-10-26 20:43:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:50,895 INFO L225 Difference]: With dead ends: 73122 [2020-10-26 20:43:50,895 INFO L226 Difference]: Without dead ends: 48282 [2020-10-26 20:43:50,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:43:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48282 states. [2020-10-26 20:43:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48282 to 48134. [2020-10-26 20:43:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48134 states. [2020-10-26 20:43:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48134 states to 48134 states and 65948 transitions. [2020-10-26 20:43:52,356 INFO L78 Accepts]: Start accepts. Automaton has 48134 states and 65948 transitions. Word has length 341 [2020-10-26 20:43:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:52,359 INFO L481 AbstractCegarLoop]: Abstraction has 48134 states and 65948 transitions. [2020-10-26 20:43:52,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 48134 states and 65948 transitions. [2020-10-26 20:43:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-10-26 20:43:52,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:52,426 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:52,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:43:52,426 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:52,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1590349006, now seen corresponding path program 1 times [2020-10-26 20:43:52,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:52,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242791184] [2020-10-26 20:43:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:53,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:55,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 362 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 20:43:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:57,854 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:57,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:57,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:43:57,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:43:58,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:43:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 131 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:43:58,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242791184] [2020-10-26 20:43:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:58,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057554695] [2020-10-26 20:43:58,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:58,604 INFO L87 Difference]: Start difference. First operand 48134 states and 65948 transitions. Second operand 7 states. [2020-10-26 20:43:58,871 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:00,512 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:02,505 INFO L93 Difference]: Finished difference Result 127738 states and 178198 transitions. [2020-10-26 20:44:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:44:02,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 346 [2020-10-26 20:44:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:02,884 INFO L225 Difference]: With dead ends: 127738 [2020-10-26 20:44:02,884 INFO L226 Difference]: Without dead ends: 83493 [2020-10-26 20:44:02,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:44:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83493 states. [2020-10-26 20:44:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83493 to 78707. [2020-10-26 20:44:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78707 states. [2020-10-26 20:44:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78707 states to 78707 states and 109644 transitions. [2020-10-26 20:44:05,512 INFO L78 Accepts]: Start accepts. Automaton has 78707 states and 109644 transitions. Word has length 346 [2020-10-26 20:44:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:05,512 INFO L481 AbstractCegarLoop]: Abstraction has 78707 states and 109644 transitions. [2020-10-26 20:44:05,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:44:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 78707 states and 109644 transitions. [2020-10-26 20:44:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-10-26 20:44:05,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:05,671 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:05,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:44:05,671 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1876905037, now seen corresponding path program 1 times [2020-10-26 20:44:05,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:05,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112268295] [2020-10-26 20:44:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:07,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:10,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-26 20:44:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,095 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:11,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:11,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,254 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:44:11,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:44:11,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:44:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:44:11,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:44:12,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112268295] [2020-10-26 20:44:12,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:12,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:12,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987934219] [2020-10-26 20:44:12,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:12,309 INFO L87 Difference]: Start difference. First operand 78707 states and 109644 transitions. Second operand 8 states. [2020-10-26 20:44:12,577 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:13,958 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:17,048 INFO L93 Difference]: Finished difference Result 186318 states and 266262 transitions. [2020-10-26 20:44:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:44:17,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 356 [2020-10-26 20:44:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:17,896 INFO L225 Difference]: With dead ends: 186318 [2020-10-26 20:44:17,896 INFO L226 Difference]: Without dead ends: 116134 [2020-10-26 20:44:18,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116134 states. [2020-10-26 20:44:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116134 to 115514. [2020-10-26 20:44:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115514 states. [2020-10-26 20:44:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115514 states to 115514 states and 159252 transitions. [2020-10-26 20:44:22,069 INFO L78 Accepts]: Start accepts. Automaton has 115514 states and 159252 transitions. Word has length 356 [2020-10-26 20:44:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:22,070 INFO L481 AbstractCegarLoop]: Abstraction has 115514 states and 159252 transitions. [2020-10-26 20:44:22,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 115514 states and 159252 transitions. [2020-10-26 20:44:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-26 20:44:22,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:22,183 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:22,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:44:22,184 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash 691227619, now seen corresponding path program 1 times [2020-10-26 20:44:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:22,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951514738] [2020-10-26 20:44:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:22,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:44:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-26 20:44:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:27,907 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:27,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:27,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:27,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:27,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:44:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:44:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:44:28,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:44:28,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:44:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-26 20:44:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:44:28,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 152 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-26 20:44:29,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951514738] [2020-10-26 20:44:29,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:29,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:44:29,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564274643] [2020-10-26 20:44:29,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:44:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:29,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:44:29,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:44:29,405 INFO L87 Difference]: Start difference. First operand 115514 states and 159252 transitions. Second operand 10 states. [2020-10-26 20:44:29,679 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:31,269 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-26 20:44:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:34,328 INFO L93 Difference]: Finished difference Result 221933 states and 308024 transitions. [2020-10-26 20:44:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:44:34,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 357 [2020-10-26 20:44:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:34,682 INFO L225 Difference]: With dead ends: 221933 [2020-10-26 20:44:34,683 INFO L226 Difference]: Without dead ends: 115994 [2020-10-26 20:44:34,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115994 states. [2020-10-26 20:44:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115994 to 115802. [2020-10-26 20:44:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115802 states. [2020-10-26 20:44:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115802 states to 115802 states and 159548 transitions. [2020-10-26 20:44:38,937 INFO L78 Accepts]: Start accepts. Automaton has 115802 states and 159548 transitions. Word has length 357 [2020-10-26 20:44:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:38,937 INFO L481 AbstractCegarLoop]: Abstraction has 115802 states and 159548 transitions. [2020-10-26 20:44:38,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:44:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 115802 states and 159548 transitions. [2020-10-26 20:44:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-26 20:44:39,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:39,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:39,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:44:39,056 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1336703141, now seen corresponding path program 1 times [2020-10-26 20:44:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:39,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775646859] [2020-10-26 20:44:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:44,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 387 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:44:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0