/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_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:44:45,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:44:45,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:44:45,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:44:45,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:44:45,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:44:45,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:44:45,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:44:45,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:44:45,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:44:45,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:44:45,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:44:45,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:44:45,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:44:45,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:44:45,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:44:45,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:44:45,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:44:45,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:44:45,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:44:45,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:44:45,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:44:45,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:44:45,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:44:45,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:44:45,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:44:45,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:44:45,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:44:45,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:44:45,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:44:45,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:44:45,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:44:45,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:44:45,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:44:45,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:44:45,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:44:45,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:44:45,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:44:45,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:44:45,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:44:45,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:44:45,726 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 20:44:45,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:44:45,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:44:45,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:44:45,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:44:45,775 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:44:45,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:44:45,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:44:45,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:44:45,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:44:45,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:44:45,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:44:45,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:44:45,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:44:45,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:44:45,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:44:45,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:44:45,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:44:45,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:44:45,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:44:45,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:44:45,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:44:45,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:45,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:44:45,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:44:45,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:44:45,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:44:45,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:44:45,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:44:45,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:44:45,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:44:46,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:44:46,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:44:46,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:44:46,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:44:46,194 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:44:46,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label15.c [2020-10-26 20:44:46,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b9d0570/7ad24d0264b04c0eaef7e36e34a5f62d/FLAGb3b3b55dc [2020-10-26 20:44:47,033 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:44:47,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label15.c [2020-10-26 20:44:47,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b9d0570/7ad24d0264b04c0eaef7e36e34a5f62d/FLAGb3b3b55dc [2020-10-26 20:44:47,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b9d0570/7ad24d0264b04c0eaef7e36e34a5f62d [2020-10-26 20:44:47,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:44:47,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:44:47,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:47,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:44:47,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:44:47,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:47" (1/1) ... [2020-10-26 20:44:47,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c206df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:47, skipping insertion in model container [2020-10-26 20:44:47,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:47" (1/1) ... [2020-10-26 20:44:47,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:44:47,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:44:47,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:48,036 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:44:48,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:48,455 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:44:48,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48 WrapperNode [2020-10-26 20:44:48,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:48,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:44:48,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:44:48,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:44:48,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:44:48,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:44:48,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:44:48,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:44:48,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:48,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:44:48,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:44:48,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:44:48,798 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:44:48,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:44:48,798 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:44:48,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:44:48,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:44:48,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:44:48,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:44:48,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:44:48,800 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:44:48,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:44:48,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:44:48,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:44:48,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:44:48,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:44:48,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:44:48,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:44:51,321 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:44:51,322 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:44:51,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:51 BoogieIcfgContainer [2020-10-26 20:44:51,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:44:51,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:44:51,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:44:51,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:44:51,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:44:47" (1/3) ... [2020-10-26 20:44:51,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f04124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:51, skipping insertion in model container [2020-10-26 20:44:51,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (2/3) ... [2020-10-26 20:44:51,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f04124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:51, skipping insertion in model container [2020-10-26 20:44:51,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:51" (3/3) ... [2020-10-26 20:44:51,334 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2020-10-26 20:44:51,347 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:44:51,353 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:44:51,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:44:51,397 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:44:51,397 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:44:51,398 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:44:51,398 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:44:51,398 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:44:51,398 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:44:51,398 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:44:51,398 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:44:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:44:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 20:44:51,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:51,447 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] [2020-10-26 20:44:51,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1945129884, now seen corresponding path program 1 times [2020-10-26 20:44:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:51,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301236829] [2020-10-26 20:44:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:52,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:56,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:56,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:44:56,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:44:56,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:44:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 208 [2020-10-26 20:44:56,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:44:57,554 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:57,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:57,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:57,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:57,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:44:57,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:57,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:57,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:57,758 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 20:44:57,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301236829] [2020-10-26 20:44:57,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:44:57,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:44:57,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438193215] [2020-10-26 20:44:57,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:44:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:44:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:44:57,795 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:44:58,149 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:45:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:01,645 INFO L93 Difference]: Finished difference Result 877 states and 1539 transitions. [2020-10-26 20:45:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:45:01,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 207 [2020-10-26 20:45:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:01,666 INFO L225 Difference]: With dead ends: 877 [2020-10-26 20:45:01,666 INFO L226 Difference]: Without dead ends: 484 [2020-10-26 20:45:01,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:45:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-26 20:45:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-26 20:45:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-26 20:45:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 751 transitions. [2020-10-26 20:45:01,794 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 751 transitions. Word has length 207 [2020-10-26 20:45:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:01,796 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 751 transitions. [2020-10-26 20:45:01,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:45:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 751 transitions. [2020-10-26 20:45:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 20:45:01,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:01,806 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:45:01,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:01,807 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:01,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1404249953, now seen corresponding path program 1 times [2020-10-26 20:45:01,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:01,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853056705] [2020-10-26 20:45:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:04,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:04,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:04,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 20:45:04,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:04,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2956 [2020-10-26 20:45:04,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-26 20:45:04,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:05,226 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:05,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:05,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:05,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:05,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:05,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:45:05,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:05,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:05,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:05,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:05,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:05,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:45:05,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:45:05,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:05,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:05,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:05,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853056705] [2020-10-26 20:45:05,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:05,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:45:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223898791] [2020-10-26 20:45:05,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:05,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:05,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:05,563 INFO L87 Difference]: Start difference. First operand 466 states and 751 transitions. Second operand 7 states. [2020-10-26 20:45:05,862 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:06,345 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:09,931 INFO L93 Difference]: Finished difference Result 1379 states and 2258 transitions. [2020-10-26 20:45:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:09,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-10-26 20:45:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:09,940 INFO L225 Difference]: With dead ends: 1379 [2020-10-26 20:45:09,941 INFO L226 Difference]: Without dead ends: 919 [2020-10-26 20:45:09,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2020-10-26 20:45:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 895. [2020-10-26 20:45:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2020-10-26 20:45:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1257 transitions. [2020-10-26 20:45:10,020 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1257 transitions. Word has length 217 [2020-10-26 20:45:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:10,020 INFO L481 AbstractCegarLoop]: Abstraction has 895 states and 1257 transitions. [2020-10-26 20:45:10,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1257 transitions. [2020-10-26 20:45:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 20:45:10,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:10,027 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-26 20:45:10,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:10,028 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1063375390, now seen corresponding path program 1 times [2020-10-26 20:45:10,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:10,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030428797] [2020-10-26 20:45:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:10,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:12,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:15,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:15,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:45:15,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:15,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 20:45:15,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:15,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:15,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:15,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:45:15,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:15,509 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:15,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:15,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:15,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:15,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:45:15,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:15,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:15,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:15,705 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:15,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:15,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:15,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:45:15,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:15,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:45:15,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:45:15,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-26 20:45:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:15,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:15,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:45:15,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:15,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:45:15,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:45:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:45:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030428797] [2020-10-26 20:45:16,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:16,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:16,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712782391] [2020-10-26 20:45:16,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:16,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:16,032 INFO L87 Difference]: Start difference. First operand 895 states and 1257 transitions. Second operand 7 states. [2020-10-26 20:45:16,298 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:19,072 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:45:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:20,094 INFO L93 Difference]: Finished difference Result 2677 states and 3838 transitions. [2020-10-26 20:45:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:45:20,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2020-10-26 20:45:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:20,121 INFO L225 Difference]: With dead ends: 2677 [2020-10-26 20:45:20,122 INFO L226 Difference]: Without dead ends: 1788 [2020-10-26 20:45:20,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:45:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2020-10-26 20:45:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1764. [2020-10-26 20:45:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2020-10-26 20:45:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2474 transitions. [2020-10-26 20:45:20,240 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2474 transitions. Word has length 229 [2020-10-26 20:45:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:20,250 INFO L481 AbstractCegarLoop]: Abstraction has 1764 states and 2474 transitions. [2020-10-26 20:45:20,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2474 transitions. [2020-10-26 20:45:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 20:45:20,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:20,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:20,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:45:20,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:20,266 INFO L82 PathProgramCache]: Analyzing trace with hash -861471000, now seen corresponding path program 1 times [2020-10-26 20:45:20,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:20,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794302169] [2020-10-26 20:45:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:20,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:22,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:22,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 20:45:22,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:22,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2118 [2020-10-26 20:45:22,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-26 20:45:22,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:22,806 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:22,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:22,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:22,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:22,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:22,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:22,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:22,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:45:22,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:23,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:23,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:23,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:45:23,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:45:23,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:45:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794302169] [2020-10-26 20:45:23,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:23,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:23,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295627945] [2020-10-26 20:45:23,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:23,193 INFO L87 Difference]: Start difference. First operand 1764 states and 2474 transitions. Second operand 7 states. [2020-10-26 20:45:23,574 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:24,049 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:29,471 INFO L93 Difference]: Finished difference Result 7090 states and 11026 transitions. [2020-10-26 20:45:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:29,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 20:45:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:29,513 INFO L225 Difference]: With dead ends: 7090 [2020-10-26 20:45:29,513 INFO L226 Difference]: Without dead ends: 5332 [2020-10-26 20:45:29,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 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 20:45:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5332 states. [2020-10-26 20:45:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5332 to 4806. [2020-10-26 20:45:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4806 states. [2020-10-26 20:45:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 6712 transitions. [2020-10-26 20:45:29,746 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 6712 transitions. Word has length 238 [2020-10-26 20:45:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:29,747 INFO L481 AbstractCegarLoop]: Abstraction has 4806 states and 6712 transitions. [2020-10-26 20:45:29,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 6712 transitions. [2020-10-26 20:45:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 20:45:29,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:29,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:29,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:45:29,767 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1821477441, now seen corresponding path program 1 times [2020-10-26 20:45:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:29,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8015959] [2020-10-26 20:45:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:32,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:32,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 20:45:32,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:32,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2788 [2020-10-26 20:45:32,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:32,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:32,909 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:32,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:32,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:33,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:33,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:33,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:33,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:33,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:45:33,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:33,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:33,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:33,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:33,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:45:33,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:45:33,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:33,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:45:33,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8015959] [2020-10-26 20:45:33,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:33,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074225587] [2020-10-26 20:45:33,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:33,290 INFO L87 Difference]: Start difference. First operand 4806 states and 6712 transitions. Second operand 7 states. [2020-10-26 20:45:33,846 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:34,576 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:38,023 INFO L93 Difference]: Finished difference Result 11134 states and 17693 transitions. [2020-10-26 20:45:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:45:38,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 20:45:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:38,084 INFO L225 Difference]: With dead ends: 11134 [2020-10-26 20:45:38,085 INFO L226 Difference]: Without dead ends: 7170 [2020-10-26 20:45:38,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 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 20:45:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2020-10-26 20:45:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6968. [2020-10-26 20:45:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6968 states. [2020-10-26 20:45:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 9643 transitions. [2020-10-26 20:45:38,424 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 9643 transitions. Word has length 238 [2020-10-26 20:45:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:38,425 INFO L481 AbstractCegarLoop]: Abstraction has 6968 states and 9643 transitions. [2020-10-26 20:45:38,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 9643 transitions. [2020-10-26 20:45:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 20:45:38,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:38,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:45:38,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:45:38,451 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1338968844, now seen corresponding path program 1 times [2020-10-26 20:45:38,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:38,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623808816] [2020-10-26 20:45:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:38,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:40,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:40,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 20:45:40,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-26 20:45:40,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:45:40,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:40,760 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:40,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:40,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:40,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:40,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:45:40,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:40,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:40,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:40,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:40,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:40,955 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:41,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:41,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:45:41,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:41,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 20:45:41,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:45:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:41,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623808816] [2020-10-26 20:45:41,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:41,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:45:41,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096113122] [2020-10-26 20:45:41,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:41,242 INFO L87 Difference]: Start difference. First operand 6968 states and 9643 transitions. Second operand 7 states. [2020-10-26 20:45:41,552 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:43,301 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:45:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:45,762 INFO L93 Difference]: Finished difference Result 18521 states and 26204 transitions. [2020-10-26 20:45:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:45,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-10-26 20:45:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:45,835 INFO L225 Difference]: With dead ends: 18521 [2020-10-26 20:45:45,835 INFO L226 Difference]: Without dead ends: 12395 [2020-10-26 20:45:45,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2020-10-26 20:45:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 11917. [2020-10-26 20:45:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11917 states. [2020-10-26 20:45:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11917 states to 11917 states and 16301 transitions. [2020-10-26 20:45:46,317 INFO L78 Accepts]: Start accepts. Automaton has 11917 states and 16301 transitions. Word has length 239 [2020-10-26 20:45:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:46,318 INFO L481 AbstractCegarLoop]: Abstraction has 11917 states and 16301 transitions. [2020-10-26 20:45:46,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11917 states and 16301 transitions. [2020-10-26 20:45:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 20:45:46,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:46,360 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, 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] [2020-10-26 20:45:46,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:45:46,361 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1259410867, now seen corresponding path program 1 times [2020-10-26 20:45:46,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356946305] [2020-10-26 20:45:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:46,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:46,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:49,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:49,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 20:45:49,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3585 [2020-10-26 20:45:49,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:45:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:50,288 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:50,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:50,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:50,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:50,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:50,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:45:50,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 20:45:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:50,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:45:50,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:45:50,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:45:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:45:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356946305] [2020-10-26 20:45:50,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:50,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906391868] [2020-10-26 20:45:50,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:50,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:50,655 INFO L87 Difference]: Start difference. First operand 11917 states and 16301 transitions. Second operand 7 states. [2020-10-26 20:45:50,906 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:52,850 INFO L93 Difference]: Finished difference Result 22067 states and 30403 transitions. [2020-10-26 20:45:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:45:52,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-26 20:45:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:52,891 INFO L225 Difference]: With dead ends: 22067 [2020-10-26 20:45:52,892 INFO L226 Difference]: Without dead ends: 11408 [2020-10-26 20:45:52,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 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 20:45:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11408 states. [2020-10-26 20:45:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11408 to 11396. [2020-10-26 20:45:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11396 states. [2020-10-26 20:45:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11396 states to 11396 states and 14703 transitions. [2020-10-26 20:45:53,230 INFO L78 Accepts]: Start accepts. Automaton has 11396 states and 14703 transitions. Word has length 256 [2020-10-26 20:45:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:53,231 INFO L481 AbstractCegarLoop]: Abstraction has 11396 states and 14703 transitions. [2020-10-26 20:45:53,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 11396 states and 14703 transitions. [2020-10-26 20:45:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-26 20:45:53,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:53,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:45:53,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:45:53,264 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash 369800765, now seen corresponding path program 1 times [2020-10-26 20:45:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:53,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701025583] [2020-10-26 20:45:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:53,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:54,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-26 20:45:54,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1561 [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 20:45:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,170 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:55,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:55,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:45:55,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:55,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:45:55,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:45:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701025583] [2020-10-26 20:45:55,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:55,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:45:55,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803655033] [2020-10-26 20:45:55,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:55,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:55,601 INFO L87 Difference]: Start difference. First operand 11396 states and 14703 transitions. Second operand 7 states. [2020-10-26 20:45:55,888 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:58,352 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:59,719 INFO L93 Difference]: Finished difference Result 29616 states and 39830 transitions. [2020-10-26 20:45:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:45:59,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2020-10-26 20:45:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:59,788 INFO L225 Difference]: With dead ends: 29616 [2020-10-26 20:45:59,788 INFO L226 Difference]: Without dead ends: 19064 [2020-10-26 20:45:59,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19064 states. [2020-10-26 20:46:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19064 to 18482. [2020-10-26 20:46:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18482 states. [2020-10-26 20:46:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18482 states to 18482 states and 23588 transitions. [2020-10-26 20:46:00,370 INFO L78 Accepts]: Start accepts. Automaton has 18482 states and 23588 transitions. Word has length 262 [2020-10-26 20:46:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:00,371 INFO L481 AbstractCegarLoop]: Abstraction has 18482 states and 23588 transitions. [2020-10-26 20:46:00,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18482 states and 23588 transitions. [2020-10-26 20:46:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-26 20:46:00,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:00,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:00,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:46:00,411 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1860797140, now seen corresponding path program 1 times [2020-10-26 20:46:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:00,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138398356] [2020-10-26 20:46:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-26 20:46:03,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2752 [2020-10-26 20:46:03,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:46:03,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,545 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:03,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:03,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:46:03,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:03,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,705 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:03,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:46:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 20:46:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:04,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:46:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:46:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138398356] [2020-10-26 20:46:04,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:04,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:04,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343356180] [2020-10-26 20:46:04,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:04,221 INFO L87 Difference]: Start difference. First operand 18482 states and 23588 transitions. Second operand 8 states. [2020-10-26 20:46:04,506 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:05,750 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:46:07,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:07,857 INFO L93 Difference]: Finished difference Result 38983 states and 49698 transitions. [2020-10-26 20:46:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:46:07,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 278 [2020-10-26 20:46:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:07,923 INFO L225 Difference]: With dead ends: 38983 [2020-10-26 20:46:07,924 INFO L226 Difference]: Without dead ends: 22390 [2020-10-26 20:46:07,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:46:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22390 states. [2020-10-26 20:46:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22390 to 22292. [2020-10-26 20:46:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22292 states. [2020-10-26 20:46:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22292 states to 22292 states and 28044 transitions. [2020-10-26 20:46:08,531 INFO L78 Accepts]: Start accepts. Automaton has 22292 states and 28044 transitions. Word has length 278 [2020-10-26 20:46:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:08,531 INFO L481 AbstractCegarLoop]: Abstraction has 22292 states and 28044 transitions. [2020-10-26 20:46:08,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22292 states and 28044 transitions. [2020-10-26 20:46:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 20:46:08,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:08,571 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:08,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:46:08,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash -184606676, now seen corresponding path program 1 times [2020-10-26 20:46:08,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:08,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752183335] [2020-10-26 20:46:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:08,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:11,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:13,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:13,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 20:46:13,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:13,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 20:46:13,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:46:13,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:14,009 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:14,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:14,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:14,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:14,158 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:14,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:14,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:14,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:14,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 20:46:14,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:14,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:14,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:14,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:14,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:14,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:46:14,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:14,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:46:14,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:14,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:46:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:14,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:46:14,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:46:14,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:14,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:14,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:46:14,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:14,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:46:14,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752183335] [2020-10-26 20:46:14,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:14,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:14,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220902597] [2020-10-26 20:46:14,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:14,533 INFO L87 Difference]: Start difference. First operand 22292 states and 28044 transitions. Second operand 7 states. [2020-10-26 20:46:14,810 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:16,396 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:18,394 INFO L93 Difference]: Finished difference Result 47720 states and 60870 transitions. [2020-10-26 20:46:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:18,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2020-10-26 20:46:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:18,496 INFO L225 Difference]: With dead ends: 47720 [2020-10-26 20:46:18,497 INFO L226 Difference]: Without dead ends: 30715 [2020-10-26 20:46:18,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30715 states. [2020-10-26 20:46:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30715 to 29847. [2020-10-26 20:46:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29847 states. [2020-10-26 20:46:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29847 states to 29847 states and 37392 transitions. [2020-10-26 20:46:19,286 INFO L78 Accepts]: Start accepts. Automaton has 29847 states and 37392 transitions. Word has length 280 [2020-10-26 20:46:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:19,287 INFO L481 AbstractCegarLoop]: Abstraction has 29847 states and 37392 transitions. [2020-10-26 20:46:19,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 29847 states and 37392 transitions. [2020-10-26 20:46:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-26 20:46:19,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:19,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:19,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:46:19,322 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash -903012304, now seen corresponding path program 1 times [2020-10-26 20:46:19,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:19,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471654388] [2020-10-26 20:46:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:20,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:46:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,684 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:24,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:24,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:46:24,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:24,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:46:24,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:24,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:24,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:46:24,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 20:46:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:25,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:25,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:46:25,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:46:25,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:46:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 20:46:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471654388] [2020-10-26 20:46:25,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:25,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:25,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666161777] [2020-10-26 20:46:25,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:25,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:25,112 INFO L87 Difference]: Start difference. First operand 29847 states and 37392 transitions. Second operand 7 states. [2020-10-26 20:46:25,391 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:29,199 INFO L93 Difference]: Finished difference Result 81013 states and 104907 transitions. [2020-10-26 20:46:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:46:29,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 282 [2020-10-26 20:46:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:29,376 INFO L225 Difference]: With dead ends: 81013 [2020-10-26 20:46:29,376 INFO L226 Difference]: Without dead ends: 53063 [2020-10-26 20:46:29,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:46:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53063 states. [2020-10-26 20:46:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53063 to 52412. [2020-10-26 20:46:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52412 states. [2020-10-26 20:46:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52412 states to 52412 states and 65815 transitions. [2020-10-26 20:46:31,224 INFO L78 Accepts]: Start accepts. Automaton has 52412 states and 65815 transitions. Word has length 282 [2020-10-26 20:46:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 52412 states and 65815 transitions. [2020-10-26 20:46:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 52412 states and 65815 transitions. [2020-10-26 20:46:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-26 20:46:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:31,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:46:31,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:46:31,263 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 402684763, now seen corresponding path program 1 times [2020-10-26 20:46:31,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:31,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520496024] [2020-10-26 20:46:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:31,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:33,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:34,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:46:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 307 [2020-10-26 20:46:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,725 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:36,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:36,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:37,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:46:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:46:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:37,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 20:46:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:37,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:37,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:46:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-26 20:46:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520496024] [2020-10-26 20:46:37,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:37,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:37,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862784281] [2020-10-26 20:46:37,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:46:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:46:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:46:37,324 INFO L87 Difference]: Start difference. First operand 52412 states and 65815 transitions. Second operand 9 states. [2020-10-26 20:46:37,616 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:38,046 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:39,670 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:44,425 INFO L93 Difference]: Finished difference Result 171466 states and 227664 transitions. [2020-10-26 20:46:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:46:44,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 300 [2020-10-26 20:46:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:44,858 INFO L225 Difference]: With dead ends: 171466 [2020-10-26 20:46:44,858 INFO L226 Difference]: Without dead ends: 120951 [2020-10-26 20:46:45,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:46:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120951 states. [2020-10-26 20:46:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120951 to 119113. [2020-10-26 20:46:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119113 states. [2020-10-26 20:46:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119113 states to 119113 states and 149419 transitions. [2020-10-26 20:46:49,485 INFO L78 Accepts]: Start accepts. Automaton has 119113 states and 149419 transitions. Word has length 300 [2020-10-26 20:46:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:49,486 INFO L481 AbstractCegarLoop]: Abstraction has 119113 states and 149419 transitions. [2020-10-26 20:46:49,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:46:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 119113 states and 149419 transitions. [2020-10-26 20:46:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:46:49,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:49,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:46:49,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:46:49,545 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1765450512, now seen corresponding path program 1 times [2020-10-26 20:46:49,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:49,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493781174] [2020-10-26 20:46:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:49,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:50,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:46:54,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:54,959 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:54,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:55,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:55,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:46:55,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:46:55,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:46:55,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:46:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:46:55,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:55,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:46:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:55,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:46:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:55,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:46:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:55,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:46:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:55,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 83 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 20:46:55,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493781174] [2020-10-26 20:46:55,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:55,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:55,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626794456] [2020-10-26 20:46:55,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:55,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:55,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:55,566 INFO L87 Difference]: Start difference. First operand 119113 states and 149419 transitions. Second operand 7 states. [2020-10-26 20:46:55,838 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:58,007 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:47:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:01,016 INFO L93 Difference]: Finished difference Result 252062 states and 316167 transitions. [2020-10-26 20:47:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:01,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 302 [2020-10-26 20:47:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:01,413 INFO L225 Difference]: With dead ends: 252062 [2020-10-26 20:47:01,413 INFO L226 Difference]: Without dead ends: 134834 [2020-10-26 20:47:01,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134834 states. [2020-10-26 20:47:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134834 to 133979. [2020-10-26 20:47:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133979 states. [2020-10-26 20:47:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133979 states to 133979 states and 167704 transitions. [2020-10-26 20:47:04,753 INFO L78 Accepts]: Start accepts. Automaton has 133979 states and 167704 transitions. Word has length 302 [2020-10-26 20:47:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:04,753 INFO L481 AbstractCegarLoop]: Abstraction has 133979 states and 167704 transitions. [2020-10-26 20:47:04,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 133979 states and 167704 transitions. [2020-10-26 20:47:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:47:04,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:04,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:47:04,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:47:04,799 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1925983576, now seen corresponding path program 2 times [2020-10-26 20:47:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:04,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132844012] [2020-10-26 20:47:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:04,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:07,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:47:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 20:47:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,186 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:10,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:10,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:10,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:10,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:10,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:10,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:10,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:47:10,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:47:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:10,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:47:10,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:47:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:47:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:10,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:10,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:10,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:10,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:47:10,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:10,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 20:47:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132844012] [2020-10-26 20:47:10,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:10,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289588169] [2020-10-26 20:47:10,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:10,784 INFO L87 Difference]: Start difference. First operand 133979 states and 167704 transitions. Second operand 8 states. [2020-10-26 20:47:11,047 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:13,138 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:16,920 INFO L93 Difference]: Finished difference Result 337270 states and 425189 transitions. [2020-10-26 20:47:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:47:16,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2020-10-26 20:47:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:17,796 INFO L225 Difference]: With dead ends: 337270 [2020-10-26 20:47:17,797 INFO L226 Difference]: Without dead ends: 206432 [2020-10-26 20:47:17,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:47:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206432 states. [2020-10-26 20:47:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206432 to 205793. [2020-10-26 20:47:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205793 states. [2020-10-26 20:47:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205793 states to 205793 states and 259323 transitions. [2020-10-26 20:47:23,111 INFO L78 Accepts]: Start accepts. Automaton has 205793 states and 259323 transitions. Word has length 302 [2020-10-26 20:47:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:23,111 INFO L481 AbstractCegarLoop]: Abstraction has 205793 states and 259323 transitions. [2020-10-26 20:47:23,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 205793 states and 259323 transitions. [2020-10-26 20:47:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-26 20:47:23,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:23,176 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-10-26 20:47:23,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:47:23,177 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1711433067, now seen corresponding path program 1 times [2020-10-26 20:47:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:23,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355773300] [2020-10-26 20:47:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:23,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:25,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:47:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,491 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:28,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:28,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:28,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 20:47:28,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:28,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:28,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:47:28,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:47:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:47:28,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:47:28,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:47:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 20:47:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 102 proven. 53 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:47:29,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355773300] [2020-10-26 20:47:29,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:29,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:47:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618125121] [2020-10-26 20:47:29,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:47:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:47:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:47:29,096 INFO L87 Difference]: Start difference. First operand 205793 states and 259323 transitions. Second operand 10 states. [2020-10-26 20:47:29,391 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:29,804 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:30,535 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:47:38,250 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:42,848 INFO L93 Difference]: Finished difference Result 415858 states and 551124 transitions. [2020-10-26 20:47:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:47:42,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 305 [2020-10-26 20:47:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:44,101 INFO L225 Difference]: With dead ends: 415858 [2020-10-26 20:47:44,101 INFO L226 Difference]: Without dead ends: 210491 [2020-10-26 20:47:44,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:47:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210491 states. [2020-10-26 20:47:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210491 to 204970. [2020-10-26 20:47:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204970 states. [2020-10-26 20:47:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204970 states to 204970 states and 256666 transitions. [2020-10-26 20:47:49,943 INFO L78 Accepts]: Start accepts. Automaton has 204970 states and 256666 transitions. Word has length 305 [2020-10-26 20:47:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:49,944 INFO L481 AbstractCegarLoop]: Abstraction has 204970 states and 256666 transitions. [2020-10-26 20:47:49,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:47:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 204970 states and 256666 transitions. [2020-10-26 20:47:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-26 20:47:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:50,032 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:47:50,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:47:50,032 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2003240781, now seen corresponding path program 1 times [2020-10-26 20:47:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:50,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477572535] [2020-10-26 20:47:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:51,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:55,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-26 20:47:55,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:55,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 20:47:55,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 20:47:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:55,413 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:55,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:55,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:55,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:55,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:55,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:47:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:55,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:47:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:55,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:55,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 20:47:55,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:55,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 20:47:55,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:55,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:47:55,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:56,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:47:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:56,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:56,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:56,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:56,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:47:56,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:56,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 120 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:47:56,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477572535] [2020-10-26 20:47:56,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:56,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130575947] [2020-10-26 20:47:56,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:56,540 INFO L87 Difference]: Start difference. First operand 204970 states and 256666 transitions. Second operand 8 states. [2020-10-26 20:47:56,803 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:05,297 INFO L93 Difference]: Finished difference Result 525279 states and 680536 transitions. [2020-10-26 20:48:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:48:05,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-10-26 20:48:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted.