/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:09:46,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:09:46,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:09:46,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:09:46,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:09:46,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:09:46,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:09:46,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:09:46,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:09:46,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:09:46,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:09:46,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:09:46,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:09:46,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:09:46,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:09:46,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:09:46,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:09:46,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:09:46,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:09:46,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:09:46,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:09:46,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:09:46,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:09:46,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:09:46,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:09:46,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:09:46,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:09:46,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:09:46,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:09:46,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:09:46,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:09:46,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:09:46,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:09:46,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:09:46,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:09:46,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:09:46,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:09:46,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:09:46,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:09:46,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:09:46,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:09:46,607 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 [2020-10-15 00:09:46,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:09:46,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:09:46,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:09:46,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:09:46,632 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:09:46,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:09:46,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:09:46,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:09:46,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:09:46,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:09:46,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:09:46,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:09:46,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:09:46,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:09:46,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:09:46,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:09:46,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:09:46,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:09:46,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:09:46,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:09:46,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:09:46,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:09:46,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:09:46,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:09:46,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:09:46,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:09:46,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:09:46,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:09:46,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:09:46,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:09:46,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:09:46,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:09:46,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:09:46,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:09:46,972 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:09:46,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2020-10-15 00:09:47,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abdcc2e71/a590c8168ee049c08126b51e44f7528c/FLAGfca9b433b [2020-10-15 00:09:47,532 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:09:47,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_search.c [2020-10-15 00:09:47,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abdcc2e71/a590c8168ee049c08126b51e44f7528c/FLAGfca9b433b [2020-10-15 00:09:47,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abdcc2e71/a590c8168ee049c08126b51e44f7528c [2020-10-15 00:09:47,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:09:47,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:09:47,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:47,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:09:47,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:09:47,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:47" (1/1) ... [2020-10-15 00:09:47,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36345b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:47, skipping insertion in model container [2020-10-15 00:09:47,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:47" (1/1) ... [2020-10-15 00:09:47,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:09:47,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:09:48,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:48,105 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:09:48,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:48,141 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:09:48,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48 WrapperNode [2020-10-15 00:09:48,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:48,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:09:48,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:09:48,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:09:48,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (1/1) ... [2020-10-15 00:09:48,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:09:48,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:09:48,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:09:48,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:09:48,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (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 [2020-10-15 00:09:48,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:09:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:09:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:09:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-15 00:09:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:09:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:09:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-15 00:09:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:09:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 00:09:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:09:48,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:09:48,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 00:09:48,587 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:09:48,587 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:09:48,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:48 BoogieIcfgContainer [2020-10-15 00:09:48,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:09:48,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:09:48,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:09:48,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:09:48,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:47" (1/3) ... [2020-10-15 00:09:48,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6338a410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:48, skipping insertion in model container [2020-10-15 00:09:48,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:48" (2/3) ... [2020-10-15 00:09:48,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6338a410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:48, skipping insertion in model container [2020-10-15 00:09:48,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:48" (3/3) ... [2020-10-15 00:09:48,600 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-10-15 00:09:48,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:09:48,617 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:09:48,632 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:09:48,660 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:09:48,660 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:09:48,661 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:09:48,661 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:09:48,661 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:09:48,661 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:09:48,661 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:09:48,661 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:09:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-15 00:09:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:09:48,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:48,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:48,695 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2020-10-15 00:09:48,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:48,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708724396] [2020-10-15 00:09:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:48,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:49,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:09:49,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:49,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-15 00:09:49,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:49,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:49,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 00:09:49,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:09:49,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-15 00:09:49,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:49,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:49,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:49,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:49,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:49,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:49,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:49,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-15 00:09:49,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:49,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-15 00:09:49,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:49,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:49,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:49,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708724396] [2020-10-15 00:09:49,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:49,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 00:09:49,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154575820] [2020-10-15 00:09:49,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:49,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:49,728 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-10-15 00:09:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:50,004 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-15 00:09:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:09:50,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-15 00:09:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:50,015 INFO L225 Difference]: With dead ends: 54 [2020-10-15 00:09:50,015 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:09:50,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:09:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-15 00:09:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 00:09:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-15 00:09:50,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2020-10-15 00:09:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:50,062 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-15 00:09:50,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-15 00:09:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:09:50,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:50,063 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] [2020-10-15 00:09:50,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:09:50,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2020-10-15 00:09:50,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:50,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148560507] [2020-10-15 00:09:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:09:50,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-15 00:09:50,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:09:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:09:50,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:50,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:50,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-15 00:09:50,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-15 00:09:50,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:09:50,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-15 00:09:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:50,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148560507] [2020-10-15 00:09:50,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:50,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 00:09:50,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529603339] [2020-10-15 00:09:50,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:50,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:50,784 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-15 00:09:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:50,939 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-15 00:09:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:09:50,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-15 00:09:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:50,941 INFO L225 Difference]: With dead ends: 34 [2020-10-15 00:09:50,941 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:09:50,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:09:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-15 00:09:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 00:09:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-15 00:09:50,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-15 00:09:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:50,951 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-15 00:09:50,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-15 00:09:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:09:50,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:50,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:50,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:09:50,953 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2020-10-15 00:09:50,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:50,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890490308] [2020-10-15 00:09:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:51,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:09:51,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-15 00:09:51,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:51,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:09:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:09:51,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:51,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:51,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:51,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:51,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:51,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:51,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:51,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-15 00:09:51,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-15 00:09:51,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:51,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:09:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:09:51,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890490308] [2020-10-15 00:09:51,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:51,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:09:51,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116557083] [2020-10-15 00:09:51,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:51,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:51,829 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-15 00:09:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:52,084 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-15 00:09:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:09:52,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-15 00:09:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:52,087 INFO L225 Difference]: With dead ends: 36 [2020-10-15 00:09:52,087 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:09:52,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:09:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-15 00:09:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 00:09:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-15 00:09:52,095 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 24 [2020-10-15 00:09:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:52,095 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-15 00:09:52,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-15 00:09:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:09:52,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:52,097 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:52,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:09:52,097 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2090216834, now seen corresponding path program 1 times [2020-10-15 00:09:52,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:52,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172354746] [2020-10-15 00:09:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:52,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:09:52,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-15 00:09:52,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:52,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:09:52,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:09:52,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:52,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:52,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:52,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:52,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:52,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:52,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:52,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:52,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-15 00:09:52,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:52,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-15 00:09:52,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:52,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:09:52,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:52,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172354746] [2020-10-15 00:09:52,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:52,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:09:52,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57270492] [2020-10-15 00:09:52,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:09:52,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:09:52,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:09:52,330 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-15 00:09:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:52,447 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-15 00:09:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:09:52,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-15 00:09:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:52,451 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:09:52,451 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:09:52,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:09:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-15 00:09:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:09:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-15 00:09:52,460 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-10-15 00:09:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:52,460 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-15 00:09:52,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:09:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-15 00:09:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:09:52,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:52,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:52,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:09:52,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1832051396, now seen corresponding path program 1 times [2020-10-15 00:09:52,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:52,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881720684] [2020-10-15 00:09:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:52,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:09:53,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:53,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-15 00:09:53,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:09:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:53,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:53,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:53,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:53,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:53,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-15 00:09:53,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:53,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-15 00:09:53,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:09:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:53,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881720684] [2020-10-15 00:09:53,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:53,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:09:53,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838504294] [2020-10-15 00:09:53,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:53,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:53,344 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-15 00:09:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:53,576 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-15 00:09:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:09:53,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-15 00:09:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:53,578 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:09:53,578 INFO L226 Difference]: Without dead ends: 31 [2020-10-15 00:09:53,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-15 00:09:53,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-15 00:09:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:09:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-15 00:09:53,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-10-15 00:09:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:53,586 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-15 00:09:53,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-15 00:09:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:53,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:53,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:53,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:09:53,588 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -648228970, now seen corresponding path program 1 times [2020-10-15 00:09:53,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:53,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752000199] [2020-10-15 00:09:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:53,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:09:53,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:53,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-15 00:09:53,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:09:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:09:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:53,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:53,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:53,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:09:53,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-15 00:09:53,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:53,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:09:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:53,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752000199] [2020-10-15 00:09:53,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:53,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:09:53,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804008602] [2020-10-15 00:09:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:53,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:53,907 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-15 00:09:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:54,062 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-15 00:09:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:09:54,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-15 00:09:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:54,064 INFO L225 Difference]: With dead ends: 52 [2020-10-15 00:09:54,064 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 00:09:54,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 00:09:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-15 00:09:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 00:09:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-15 00:09:54,072 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-15 00:09:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:54,073 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-15 00:09:54,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-15 00:09:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:54,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:54,074 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:54,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:09:54,074 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 2 times [2020-10-15 00:09:54,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:54,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811683686] [2020-10-15 00:09:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:55,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:55,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:09:55,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:55,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-15 00:09:55,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:55,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:09:55,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:55,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:09:55,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:56,142 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 24 [2020-10-15 00:09:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:56,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:56,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:56,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:09:56,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:56,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-15 00:09:56,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:09:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:09:56,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:57,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811683686] [2020-10-15 00:09:57,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:57,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:09:57,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393650239] [2020-10-15 00:09:57,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:09:57,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:09:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:57,175 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-15 00:09:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:57,617 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-15 00:09:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:09:57,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-15 00:09:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:57,619 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:09:57,619 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:09:57,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:09:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-15 00:09:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 00:09:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-15 00:09:57,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2020-10-15 00:09:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:57,626 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-15 00:09:57,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:09:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-15 00:09:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:09:57,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:57,628 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:57,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:09:57,628 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash -723812178, now seen corresponding path program 2 times [2020-10-15 00:09:57,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:57,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773526678] [2020-10-15 00:09:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:09:57,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-15 00:09:57,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:09:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:09:57,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:57,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:57,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:57,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:57,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:57,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:09:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:09:57,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-15 00:09:57,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:09:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:09:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:58,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773526678] [2020-10-15 00:09:58,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:58,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:09:58,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161966230] [2020-10-15 00:09:58,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:58,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:58,086 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-10-15 00:09:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:58,289 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-15 00:09:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:09:58,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-15 00:09:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:58,291 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:09:58,291 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 00:09:58,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 00:09:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-15 00:09:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:09:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-15 00:09:58,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-15 00:09:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:58,298 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-15 00:09:58,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-15 00:09:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:09:58,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:58,299 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:58,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:09:58,300 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 3 times [2020-10-15 00:09:58,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:58,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42284050] [2020-10-15 00:09:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:58,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:09:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:09:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-15 00:09:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:59,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:09:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:09:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:00,081 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 27 [2020-10-15 00:10:00,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:00,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:00,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:00,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:00,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:00,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:00,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:00,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:00,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:00,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:10:00,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:10:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:10:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:00,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42284050] [2020-10-15 00:10:00,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:00,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:10:00,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443854181] [2020-10-15 00:10:00,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:10:00,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:10:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:10:00,931 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-15 00:10:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:01,423 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-15 00:10:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:10:01,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-15 00:10:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:01,424 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:10:01,424 INFO L226 Difference]: Without dead ends: 39 [2020-10-15 00:10:01,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-15 00:10:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-15 00:10:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:10:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-15 00:10:01,437 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2020-10-15 00:10:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:01,437 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-15 00:10:01,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:10:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-15 00:10:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:10:01,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:01,442 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:01,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:10:01,442 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:01,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1595152954, now seen corresponding path program 3 times [2020-10-15 00:10:01,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:01,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753003679] [2020-10-15 00:10:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:01,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:10:01,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-15 00:10:01,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:01,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:01,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:10:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:10:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:10:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:01,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:01,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:01,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:01,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:01,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:01,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:10:01,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:01,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-15 00:10:01,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:01,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:01,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:10:01,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:01,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:10:01,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:02,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753003679] [2020-10-15 00:10:02,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:02,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:10:02,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299855934] [2020-10-15 00:10:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:10:02,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:10:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:10:02,021 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 8 states. [2020-10-15 00:10:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:02,253 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-15 00:10:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:10:02,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-15 00:10:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:02,255 INFO L225 Difference]: With dead ends: 60 [2020-10-15 00:10:02,255 INFO L226 Difference]: Without dead ends: 46 [2020-10-15 00:10:02,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:10:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-15 00:10:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-15 00:10:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 00:10:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-15 00:10:02,269 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-15 00:10:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:02,269 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-15 00:10:02,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:10:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-15 00:10:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:10:02,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:02,272 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:02,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:10:02,272 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1336987516, now seen corresponding path program 4 times [2020-10-15 00:10:02,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:02,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976045799] [2020-10-15 00:10:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:10:07,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:10:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:10:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:10:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:10:07,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,792 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 34 [2020-10-15 00:10:07,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:07,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:07,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:07,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:07,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:07,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:07,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:10:10,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:10:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-15 00:10:10,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:10,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:10:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:10:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:11,261 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-10-15 00:10:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:11,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976045799] [2020-10-15 00:10:11,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:11,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:10:11,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667360415] [2020-10-15 00:10:11,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:10:11,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:10:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:10:11,783 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 12 states. [2020-10-15 00:10:12,313 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-15 00:10:12,660 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-15 00:10:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:12,750 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-15 00:10:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:10:12,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-15 00:10:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:12,752 INFO L225 Difference]: With dead ends: 52 [2020-10-15 00:10:12,752 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 00:10:12,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:10:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 00:10:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-15 00:10:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:10:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-15 00:10:12,769 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 36 [2020-10-15 00:10:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:12,770 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-15 00:10:12,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:10:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-15 00:10:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:10:12,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:12,773 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:12,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:10:12,773 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1972633310, now seen corresponding path program 4 times [2020-10-15 00:10:12,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:12,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540835818] [2020-10-15 00:10:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:13,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:10:13,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:13,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-15 00:10:13,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:13,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:10:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:10:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:10:13,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:13,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:13,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:13,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:13,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:13,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:13,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:13,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:13,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:10:13,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:13,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-15 00:10:13,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:13,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:10:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:10:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:13,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540835818] [2020-10-15 00:10:13,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:13,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:10:13,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333365998] [2020-10-15 00:10:13,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:10:13,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:10:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:10:13,432 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2020-10-15 00:10:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:13,741 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-15 00:10:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:10:13,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-15 00:10:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:13,743 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:10:13,744 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 00:10:13,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 00:10:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-10-15 00:10:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 00:10:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-15 00:10:13,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 40 [2020-10-15 00:10:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:13,760 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-15 00:10:13,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:10:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-15 00:10:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:10:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:13,764 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:13,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:10:13,767 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2064168548, now seen corresponding path program 5 times [2020-10-15 00:10:13,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:13,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602189989] [2020-10-15 00:10:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:18,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:10:18,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:10:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:10:18,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:18,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:10:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:10:18,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:19,370 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 24 [2020-10-15 00:10:19,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:19,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:19,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:19,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:19,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:19,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:19,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:19,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:19,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:23,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:10:23,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:10:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-10-15 00:10:23,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:23,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:10:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:23,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:10:23,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:10:24,714 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 42 [2020-10-15 00:10:25,746 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 47 [2020-10-15 00:10:27,004 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 47 [2020-10-15 00:10:35,832 WARN L193 SmtUtils]: Spent 8.67 s on a formula simplification. DAG size of input: 196 DAG size of output: 100 [2020-10-15 00:10:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:35,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602189989] [2020-10-15 00:10:35,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:35,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:10:35,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428103301] [2020-10-15 00:10:35,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:10:35,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:10:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:10:35,982 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 13 states. [2020-10-15 00:10:37,736 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 00:10:38,620 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-15 00:10:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:39,789 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-15 00:10:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:10:39,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-15 00:10:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:39,790 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:10:39,790 INFO L226 Difference]: Without dead ends: 47 [2020-10-15 00:10:39,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:10:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-15 00:10:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-15 00:10:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 00:10:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-15 00:10:39,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 40 [2020-10-15 00:10:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:39,799 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-15 00:10:39,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:10:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-15 00:10:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:10:39,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:39,800 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:39,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:10:39,800 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 400149494, now seen corresponding path program 5 times [2020-10-15 00:10:39,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:39,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400857498] [2020-10-15 00:10:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:10:40,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-15 00:10:40,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:10:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:10:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:10:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:40,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:40,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:40,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:40,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:40,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:40,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:40,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:10:40,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:40,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-15 00:10:40,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:10:40,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:10:40,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:40,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400857498] [2020-10-15 00:10:40,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:40,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:10:40,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169331710] [2020-10-15 00:10:40,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:10:40,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:40,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:10:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:10:40,455 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-10-15 00:10:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:40,927 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-15 00:10:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:10:40,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-15 00:10:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:40,929 INFO L225 Difference]: With dead ends: 68 [2020-10-15 00:10:40,929 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:10:40,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:10:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:10:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-15 00:10:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:10:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-15 00:10:40,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 44 [2020-10-15 00:10:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:40,938 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-15 00:10:40,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:10:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-15 00:10:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:10:40,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:40,939 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:40,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:10:40,939 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash 658314932, now seen corresponding path program 6 times [2020-10-15 00:10:40,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704224272] [2020-10-15 00:10:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:40,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:44,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:45,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:45,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:10:45,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:10:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:47,391 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 141 DAG size of output: 24 [2020-10-15 00:10:47,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:47,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:47,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:47,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:47,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:47,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:47,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:47,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:52,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:10:52,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:10:52,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-15 00:10:52,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:52,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:52,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:10:52,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:10:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:53,652 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-15 00:10:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704224272] [2020-10-15 00:10:53,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:53,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:53,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231138485] [2020-10-15 00:10:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:53,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:53,686 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 15 states. [2020-10-15 00:10:55,303 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 00:10:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:55,419 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-15 00:10:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:10:55,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-15 00:10:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:55,420 INFO L225 Difference]: With dead ends: 61 [2020-10-15 00:10:55,421 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:10:55,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:10:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:10:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-15 00:10:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 00:10:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-15 00:10:55,430 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 44 [2020-10-15 00:10:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:55,430 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-15 00:10:55,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-15 00:10:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:10:55,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:55,431 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:55,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:10:55,432 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1505971470, now seen corresponding path program 6 times [2020-10-15 00:10:55,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:55,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81642930] [2020-10-15 00:10:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:10:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:10:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:10:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:55,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:55,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:10:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:10:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:10:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:56,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81642930] [2020-10-15 00:10:56,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:56,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:10:56,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764576951] [2020-10-15 00:10:56,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:10:56,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:10:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:10:56,039 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 11 states. [2020-10-15 00:10:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:56,563 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-15 00:10:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:10:56,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-15 00:10:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:56,565 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:10:56,565 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:10:56,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:10:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:10:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-15 00:10:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:10:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-15 00:10:56,573 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 48 [2020-10-15 00:10:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:56,574 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-15 00:10:56,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:10:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-15 00:10:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:10:56,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:56,575 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:56,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:10:56,575 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1764136908, now seen corresponding path program 7 times [2020-10-15 00:10:56,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:56,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344205135] [2020-10-15 00:10:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:01,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:11:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:11:01,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:01,844 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 25 [2020-10-15 00:11:01,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:01,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:01,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:01,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:01,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:01,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:01,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:06,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:11:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:11:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:07,381 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2020-10-15 00:11:07,718 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-15 00:11:08,092 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 62 [2020-10-15 00:11:08,304 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 55 [2020-10-15 00:11:08,541 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 57 [2020-10-15 00:11:08,830 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 57 [2020-10-15 00:11:09,338 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 65 [2020-10-15 00:11:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:09,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344205135] [2020-10-15 00:11:09,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:11:09,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836406739] [2020-10-15 00:11:09,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:11:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:11:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:11:09,536 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 16 states. [2020-10-15 00:11:10,630 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-15 00:11:10,938 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-15 00:11:11,188 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-15 00:11:11,859 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-15 00:11:12,151 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 00:11:12,750 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2020-10-15 00:11:13,464 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2020-10-15 00:11:14,023 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-15 00:11:14,332 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-15 00:11:15,317 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-15 00:11:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:15,723 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2020-10-15 00:11:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:11:15,724 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-15 00:11:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:15,725 INFO L225 Difference]: With dead ends: 145 [2020-10-15 00:11:15,725 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 00:11:15,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:11:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 00:11:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-15 00:11:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:11:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-15 00:11:15,742 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 48 [2020-10-15 00:11:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:15,742 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-15 00:11:15,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:11:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-15 00:11:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:11:15,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:15,743 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:15,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:11:15,743 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1826176522, now seen corresponding path program 8 times [2020-10-15 00:11:15,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:15,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068968807] [2020-10-15 00:11:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:20,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:20,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:11:20,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:21,097 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 29 [2020-10-15 00:11:21,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:21,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:21,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:21,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:21,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:21,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:22,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:26,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:26,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:11:26,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:11:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-15 00:11:26,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:26,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:26,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:11:26,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:26,622 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2020-10-15 00:11:27,054 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 00:11:27,398 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2020-10-15 00:11:27,573 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-15 00:11:27,844 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-15 00:11:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-15 00:11:28,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068968807] [2020-10-15 00:11:28,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:28,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:11:28,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296909657] [2020-10-15 00:11:28,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:11:28,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:11:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:11:28,108 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 12 states. [2020-10-15 00:11:28,498 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-15 00:11:28,733 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-15 00:11:29,053 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-15 00:11:29,399 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-15 00:11:29,782 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-15 00:11:29,991 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-15 00:11:30,378 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-15 00:11:30,601 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-15 00:11:30,848 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-15 00:11:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:31,189 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-15 00:11:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:11:31,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-15 00:11:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:31,191 INFO L225 Difference]: With dead ends: 119 [2020-10-15 00:11:31,191 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:11:31,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:11:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:11:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-15 00:11:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:11:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-15 00:11:31,198 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2020-10-15 00:11:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:31,199 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-15 00:11:31,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:11:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-15 00:11:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:11:31,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:31,199 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:31,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:11:31,200 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:31,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1705606618, now seen corresponding path program 7 times [2020-10-15 00:11:31,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:31,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101089254] [2020-10-15 00:11:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:31,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:31,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:11:31,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:31,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-15 00:11:31,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:31,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:11:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:11:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:31,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:31,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:31,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:31,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:31,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:31,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:31,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:31,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:31,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:32,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:11:32,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:32,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-15 00:11:32,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:32,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:11:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:32,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101089254] [2020-10-15 00:11:32,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:32,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:11:32,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525828590] [2020-10-15 00:11:32,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:11:32,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:11:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:11:32,336 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 12 states. [2020-10-15 00:11:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:32,996 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-15 00:11:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:11:32,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-15 00:11:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:32,998 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:11:32,998 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:11:32,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:11:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:11:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-15 00:11:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:11:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-15 00:11:33,010 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 52 [2020-10-15 00:11:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:33,010 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-15 00:11:33,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:11:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-15 00:11:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:11:33,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:33,011 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:33,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:11:33,012 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:33,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1447441180, now seen corresponding path program 9 times [2020-10-15 00:11:33,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:33,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583659934] [2020-10-15 00:11:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:33,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:38,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:11:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:38,386 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 34 [2020-10-15 00:11:38,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:38,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:38,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:38,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:38,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:38,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:38,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:38,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:38,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:40,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:11:40,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:40,714 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-15 00:11:40,879 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-15 00:11:41,060 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-15 00:11:41,265 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-15 00:11:41,677 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-15 00:11:42,112 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-15 00:11:42,464 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-15 00:11:42,761 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-15 00:11:43,057 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-15 00:11:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:43,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583659934] [2020-10-15 00:11:43,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:43,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:11:43,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325541060] [2020-10-15 00:11:43,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:11:43,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:11:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:11:43,115 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 17 states. [2020-10-15 00:11:45,797 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2020-10-15 00:11:46,214 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-15 00:11:46,940 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2020-10-15 00:11:47,236 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-15 00:11:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:47,597 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-15 00:11:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:11:47,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-15 00:11:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:47,599 INFO L225 Difference]: With dead ends: 73 [2020-10-15 00:11:47,600 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:11:47,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:11:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:11:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-15 00:11:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:11:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-15 00:11:47,610 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 52 [2020-10-15 00:11:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:47,610 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-15 00:11:47,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:11:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-15 00:11:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:11:47,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:47,611 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:47,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:11:47,612 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1167682366, now seen corresponding path program 8 times [2020-10-15 00:11:47,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:47,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997633132] [2020-10-15 00:11:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:48,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:11:48,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:11:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:48,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:48,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:11:48,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:11:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:48,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997633132] [2020-10-15 00:11:48,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:48,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:11:48,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25305136] [2020-10-15 00:11:48,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:11:48,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:11:48,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:11:48,513 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 13 states. [2020-10-15 00:11:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:49,313 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-15 00:11:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:11:49,314 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-15 00:11:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:49,315 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:11:49,315 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:11:49,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:11:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:11:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-15 00:11:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:11:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-15 00:11:49,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 56 [2020-10-15 00:11:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:49,331 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-15 00:11:49,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:11:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-15 00:11:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:11:49,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:49,339 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:49,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:11:49,340 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1425847804, now seen corresponding path program 10 times [2020-10-15 00:11:49,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:49,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476662744] [2020-10-15 00:11:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:51,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:54,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:11:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:54,767 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 28 [2020-10-15 00:11:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:54,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:54,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:54,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:54,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:54,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:11:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:11:59,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:11:59,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-15 00:11:59,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:11:59,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:59,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:11:59,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:01,629 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 31 [2020-10-15 00:12:02,078 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 39 [2020-10-15 00:12:02,572 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 39 [2020-10-15 00:12:03,077 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 38 [2020-10-15 00:12:04,114 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 86 [2020-10-15 00:12:06,069 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 224 DAG size of output: 136 [2020-10-15 00:12:07,459 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 220 DAG size of output: 133 [2020-10-15 00:12:09,638 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 210 DAG size of output: 129 [2020-10-15 00:12:10,209 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 59 [2020-10-15 00:12:10,897 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 57 [2020-10-15 00:12:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:10,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476662744] [2020-10-15 00:12:10,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:10,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:12:10,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034918013] [2020-10-15 00:12:10,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:12:10,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:12:10,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:12:10,963 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 19 states. [2020-10-15 00:12:13,422 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 55 [2020-10-15 00:12:13,820 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-15 00:12:16,117 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 188 DAG size of output: 143 [2020-10-15 00:12:19,530 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 184 DAG size of output: 138 [2020-10-15 00:12:20,443 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-15 00:12:22,210 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-15 00:12:31,913 WARN L193 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 268 DAG size of output: 181 [2020-10-15 00:12:39,813 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 176 DAG size of output: 131 [2020-10-15 00:12:42,636 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-15 00:12:44,235 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-15 00:12:47,834 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 185 DAG size of output: 139 [2020-10-15 00:12:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:48,034 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2020-10-15 00:12:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:12:48,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-10-15 00:12:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:48,039 INFO L225 Difference]: With dead ends: 107 [2020-10-15 00:12:48,040 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:12:48,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:12:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:12:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-15 00:12:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:12:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-15 00:12:48,052 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 56 [2020-10-15 00:12:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:48,053 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-15 00:12:48,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:12:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-15 00:12:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:12:48,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:48,054 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:48,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:12:48,054 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1418856534, now seen corresponding path program 9 times [2020-10-15 00:12:48,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:48,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781186392] [2020-10-15 00:12:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:48,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:48,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:48,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:12:48,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-15 00:12:48,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:48,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:12:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:12:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:12:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:48,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:48,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:48,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:48,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:48,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:12:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:12:48,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-15 00:12:48,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:48,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:12:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:12:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:12:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:49,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781186392] [2020-10-15 00:12:49,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:49,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:12:49,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937028562] [2020-10-15 00:12:49,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:12:49,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:12:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:12:49,322 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 14 states. [2020-10-15 00:12:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:50,986 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-15 00:12:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:12:50,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-15 00:12:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:50,989 INFO L225 Difference]: With dead ends: 90 [2020-10-15 00:12:50,990 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:12:50,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:12:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:12:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-15 00:12:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 00:12:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-15 00:12:51,001 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 60 [2020-10-15 00:12:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:51,001 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-15 00:12:51,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:12:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-15 00:12:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:12:51,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:51,002 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:51,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:12:51,002 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:51,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1677021972, now seen corresponding path program 11 times [2020-10-15 00:12:51,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:51,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919548302] [2020-10-15 00:12:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:51,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:51,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:52,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:56,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:12:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:12:56,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:57,316 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 181 DAG size of output: 31 [2020-10-15 00:12:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:57,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:57,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:57,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:57,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:57,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:57,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:57,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:12:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:57,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:12:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:12:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:12:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:58,792 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-10-15 00:12:58,988 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-15 00:12:59,159 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-15 00:12:59,312 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-10-15 00:12:59,458 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-10-15 00:12:59,629 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-10-15 00:12:59,809 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-15 00:13:00,334 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-15 00:13:00,578 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-15 00:13:00,802 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-15 00:13:01,044 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-15 00:13:01,353 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-15 00:13:01,704 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-15 00:13:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:13:01,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919548302] [2020-10-15 00:13:01,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:01,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:13:01,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632484714] [2020-10-15 00:13:01,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:13:01,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:13:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:13:01,752 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 19 states. [2020-10-15 00:13:05,176 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-15 00:13:05,510 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-15 00:13:06,276 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 00:13:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:06,497 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-15 00:13:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:13:06,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-15 00:13:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:06,500 INFO L225 Difference]: With dead ends: 79 [2020-10-15 00:13:06,501 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:13:06,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:13:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:13:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-15 00:13:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:13:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-15 00:13:06,512 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-15 00:13:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:06,512 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-15 00:13:06,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:13:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-15 00:13:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:13:06,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:06,514 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:06,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:13:06,515 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash -851027602, now seen corresponding path program 10 times [2020-10-15 00:13:06,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:06,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884741113] [2020-10-15 00:13:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:06,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:07,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:13:07,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:13:07,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:13:07,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:07,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:07,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:07,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:07,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:07,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:07,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:07,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:13:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:07,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:07,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:13:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:13:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:13:07,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:13:08,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884741113] [2020-10-15 00:13:08,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:08,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:13:08,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100519878] [2020-10-15 00:13:08,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:13:08,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:13:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:13:08,118 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 15 states. [2020-10-15 00:13:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:09,726 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-15 00:13:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:13:09,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-15 00:13:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:09,729 INFO L225 Difference]: With dead ends: 98 [2020-10-15 00:13:09,729 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:13:09,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:13:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:13:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-15 00:13:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:13:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-15 00:13:09,739 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2020-10-15 00:13:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:09,739 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-15 00:13:09,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:13:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-15 00:13:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:13:09,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:09,740 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:09,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:13:09,740 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -592862164, now seen corresponding path program 12 times [2020-10-15 00:13:09,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:09,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779304589] [2020-10-15 00:13:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:13:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:13:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:15,263 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 24 [2020-10-15 00:13:15,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:15,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:15,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:15,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:15,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:13:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:20,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:20,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:13:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:21,131 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-10-15 00:13:21,353 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-15 00:13:21,563 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-15 00:13:21,834 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-15 00:13:22,129 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-15 00:13:22,491 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-15 00:13:23,020 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-15 00:13:23,725 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-15 00:13:24,325 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-15 00:13:24,872 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-15 00:13:25,377 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-15 00:13:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:13:25,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779304589] [2020-10-15 00:13:25,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:25,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:13:25,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288620529] [2020-10-15 00:13:25,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:13:25,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:13:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:13:25,441 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 21 states. [2020-10-15 00:13:27,787 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-15 00:13:28,440 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-15 00:13:29,107 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-15 00:13:29,943 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2020-10-15 00:13:30,891 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-15 00:13:31,814 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2020-10-15 00:13:33,119 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-10-15 00:13:33,690 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-15 00:13:34,932 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-15 00:13:39,859 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 172 [2020-10-15 00:13:41,171 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 131