/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=NARROWEST --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/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:20:01,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:20:01,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:20:01,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:20:01,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:20:01,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:20:01,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:20:01,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:20:01,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:20:01,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:20:01,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:20:01,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:20:01,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:20:01,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:20:01,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:20:01,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:20:01,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:20:01,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:20:01,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:20:01,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:20:01,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:20:01,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:20:01,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:20:01,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:20:01,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:20:01,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:20:01,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:20:01,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:20:01,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:20:01,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:20:01,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:20:01,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:20:01,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:20:01,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:20:01,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:20:01,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:20:01,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:20:01,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:20:01,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:20:01,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:20:01,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:20:01,344 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 [2020-10-13 05:20:01,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:20:01,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:20:01,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:20:01,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:20:01,388 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:20:01,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:20:01,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:20:01,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:20:01,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:20:01,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:20:01,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:20:01,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:20:01,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:20:01,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:20:01,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:20:01,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:20:01,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:20:01,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:20:01,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:20:01,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:20:01,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:20:01,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:01,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:20:01,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:20:01,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:20:01,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:20:01,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:20:01,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:20:01,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:20:01,394 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:20:01,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:20:01,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:20:01,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:20:01,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:20:01,688 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:20:01,688 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-13 05:20:01,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ceebfb3e0/7b1f8884b3a342acb2669db40454fc0a/FLAG9e968ac7f [2020-10-13 05:20:02,164 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:20:02,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-13 05:20:02,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ceebfb3e0/7b1f8884b3a342acb2669db40454fc0a/FLAG9e968ac7f [2020-10-13 05:20:02,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ceebfb3e0/7b1f8884b3a342acb2669db40454fc0a [2020-10-13 05:20:02,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:20:02,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:20:02,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:02,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:20:02,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:20:02,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b481d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02, skipping insertion in model container [2020-10-13 05:20:02,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:20:02,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:20:02,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:02,805 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:20:02,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:02,847 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:20:02,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02 WrapperNode [2020-10-13 05:20:02,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:02,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:20:02,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:20:02,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:20:02,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:20:02,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:20:02,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:20:02,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:20:02,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (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 [2020-10-13 05:20:03,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:20:03,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:20:03,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:20:03,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:20:03,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:20:03,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:20:03,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:20:03,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:20:03,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:20:03,283 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:20:03,283 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:20:03,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:03 BoogieIcfgContainer [2020-10-13 05:20:03,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:20:03,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:20:03,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:20:03,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:20:03,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:20:02" (1/3) ... [2020-10-13 05:20:03,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:03, skipping insertion in model container [2020-10-13 05:20:03,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (2/3) ... [2020-10-13 05:20:03,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:03, skipping insertion in model container [2020-10-13 05:20:03,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:03" (3/3) ... [2020-10-13 05:20:03,296 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2020-10-13 05:20:03,308 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:20:03,315 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:20:03,331 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:20:03,357 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:20:03,357 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:20:03,357 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:20:03,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:20:03,358 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:20:03,358 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:20:03,358 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:20:03,358 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:20:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 05:20:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:20:03,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:03,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:03,387 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:03,397 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2020-10-13 05:20:03,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:03,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998622305] [2020-10-13 05:20:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:20:03,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:03,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 05:20:03,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:20:03,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:03,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:03,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:20:03,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:03,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:03,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998622305] [2020-10-13 05:20:03,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:03,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:20:03,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692958300] [2020-10-13 05:20:03,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:20:03,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:20:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:03,824 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 05:20:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:03,916 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-13 05:20:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:20:03,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 05:20:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:03,927 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:20:03,927 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:20:03,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:20:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 05:20:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 05:20:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 05:20:03,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-13 05:20:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:03,973 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 05:20:03,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:20:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 05:20:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:20:03,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:03,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:03,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:20:03,975 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2020-10-13 05:20:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:03,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408198888] [2020-10-13 05:20:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:20:04,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:04,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 05:20:04,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:20:04,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:04,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:04,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:04,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:20:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:04,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408198888] [2020-10-13 05:20:04,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:04,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:20:04,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078439858] [2020-10-13 05:20:04,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:20:04,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:20:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:04,270 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-13 05:20:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:04,353 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-13 05:20:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:20:04,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 05:20:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:04,355 INFO L225 Difference]: With dead ends: 45 [2020-10-13 05:20:04,355 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:20:04,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:20:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 05:20:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:20:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 05:20:04,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-10-13 05:20:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:04,365 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 05:20:04,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:20:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 05:20:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:20:04,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:04,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:04,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:20:04,367 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2020-10-13 05:20:04,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:04,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539103836] [2020-10-13 05:20:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:20:04,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:04,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-13 05:20:04,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:04,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:04,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:04,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:20:04,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539103836] [2020-10-13 05:20:04,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:04,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:20:04,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564027472] [2020-10-13 05:20:04,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:04,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:04,825 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-10-13 05:20:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:04,913 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-13 05:20:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:04,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:20:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:04,915 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:20:04,915 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:20:04,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:20:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-13 05:20:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:20:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 05:20:04,923 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-13 05:20:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:04,923 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 05:20:04,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 05:20:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:20:04,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:04,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:04,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:20:04,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -845622965, now seen corresponding path program 2 times [2020-10-13 05:20:04,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:04,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313212281] [2020-10-13 05:20:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:06,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:06,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1153 [2020-10-13 05:20:06,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:06,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:20:06,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:06,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:06,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:06,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:20:06,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313212281] [2020-10-13 05:20:06,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:06,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:20:06,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742751979] [2020-10-13 05:20:06,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:06,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:06,146 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 05:20:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:06,237 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-13 05:20:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:06,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 05:20:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:06,239 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:20:06,239 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:20:06,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:20:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-13 05:20:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:20:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-13 05:20:06,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2020-10-13 05:20:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:06,256 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-13 05:20:06,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-13 05:20:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:20:06,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:06,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:06,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:20:06,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:06,261 INFO L82 PathProgramCache]: Analyzing trace with hash -452595955, now seen corresponding path program 1 times [2020-10-13 05:20:06,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:06,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979604374] [2020-10-13 05:20:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:06,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-13 05:20:06,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:06,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:06,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:06,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:06,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:06,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:06,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:20:06,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979604374] [2020-10-13 05:20:06,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:06,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:20:06,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359393868] [2020-10-13 05:20:06,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:06,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:06,993 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-13 05:20:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:07,087 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-13 05:20:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:07,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 05:20:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:07,088 INFO L225 Difference]: With dead ends: 74 [2020-10-13 05:20:07,089 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:20:07,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:20:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-13 05:20:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 05:20:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 05:20:07,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-13 05:20:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:07,097 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 05:20:07,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 05:20:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:20:07,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:07,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:07,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:20:07,099 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1652438966, now seen corresponding path program 2 times [2020-10-13 05:20:07,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:07,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301295020] [2020-10-13 05:20:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:20:08,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-13 05:20:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:20:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:20:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:08,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:20:08,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301295020] [2020-10-13 05:20:08,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:08,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:20:08,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105397002] [2020-10-13 05:20:08,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:20:08,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:20:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:08,219 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-10-13 05:20:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:08,364 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-10-13 05:20:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:20:08,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 05:20:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:08,366 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:20:08,366 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 05:20:08,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 05:20:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-13 05:20:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:20:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-13 05:20:08,374 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 31 [2020-10-13 05:20:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:08,375 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-13 05:20:08,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:20:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-13 05:20:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:20:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:08,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:08,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:20:08,377 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1444845839, now seen corresponding path program 3 times [2020-10-13 05:20:08,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:08,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437598114] [2020-10-13 05:20:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:10,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:20:10,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2164 [2020-10-13 05:20:10,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:20:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:20:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:10,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:10,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:10,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:10,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:10,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:20:10,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437598114] [2020-10-13 05:20:10,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:10,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:20:10,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828870296] [2020-10-13 05:20:10,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:20:10,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:20:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:10,623 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 8 states. [2020-10-13 05:20:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:10,798 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-13 05:20:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:20:10,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 05:20:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:10,801 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:20:10,801 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:20:10,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:20:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-13 05:20:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:20:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-13 05:20:10,810 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2020-10-13 05:20:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:10,810 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-13 05:20:10,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:20:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-13 05:20:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:10,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:10,812 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:10,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:20:10,813 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -366397486, now seen corresponding path program 4 times [2020-10-13 05:20:10,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:10,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859546676] [2020-10-13 05:20:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:14,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3727 [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:14,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:20:14,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:14,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:14,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:14,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:14,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 05:20:14,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859546676] [2020-10-13 05:20:14,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:14,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:20:14,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278517682] [2020-10-13 05:20:14,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:20:14,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:20:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:14,645 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 9 states. [2020-10-13 05:20:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:14,777 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-13 05:20:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:20:14,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-13 05:20:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:14,779 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:20:14,779 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:20:14,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:20:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-10-13 05:20:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:20:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 05:20:14,794 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 41 [2020-10-13 05:20:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:14,794 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 05:20:14,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:20:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 05:20:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:20:14,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:14,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:14,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:20:14,800 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1560772907, now seen corresponding path program 5 times [2020-10-13 05:20:14,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:14,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244578247] [2020-10-13 05:20:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:14,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:18,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:18,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:20:18,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4042 [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:20:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:18,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:18,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:18,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 05:20:18,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244578247] [2020-10-13 05:20:18,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:18,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:20:18,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774583535] [2020-10-13 05:20:18,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:20:18,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:20:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:18,958 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 10 states. [2020-10-13 05:20:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:19,114 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-10-13 05:20:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:20:19,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-13 05:20:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:19,117 INFO L225 Difference]: With dead ends: 130 [2020-10-13 05:20:19,117 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:20:19,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:20:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-13 05:20:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:20:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-13 05:20:19,133 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 46 [2020-10-13 05:20:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:19,134 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-13 05:20:19,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:20:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-13 05:20:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:20:19,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:19,135 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:19,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:20:19,135 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash -835225618, now seen corresponding path program 6 times [2020-10-13 05:20:19,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:19,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192108359] [2020-10-13 05:20:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:19,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:24,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:20:24,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:24,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:20:24,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:20:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:20:24,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:24,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:24,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:24,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:24,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:24,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:24,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:24,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:24,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:24,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 05:20:24,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192108359] [2020-10-13 05:20:24,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:24,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:20:24,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821486313] [2020-10-13 05:20:24,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:20:24,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:20:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:24,272 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 11 states. [2020-10-13 05:20:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:24,423 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2020-10-13 05:20:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:20:24,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 05:20:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:24,425 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:20:24,425 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:20:24,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:20:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-13 05:20:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:20:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2020-10-13 05:20:24,441 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 51 [2020-10-13 05:20:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:24,444 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2020-10-13 05:20:24,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:20:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2020-10-13 05:20:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:20:24,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:24,446 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:24,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:20:24,446 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1861056185, now seen corresponding path program 7 times [2020-10-13 05:20:24,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705889460] [2020-10-13 05:20:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:24,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:29,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:20:29,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:29,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:20:29,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:20:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:20:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:29,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:29,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:29,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:29,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:29,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:29,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 05:20:29,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705889460] [2020-10-13 05:20:29,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:29,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:20:29,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307070959] [2020-10-13 05:20:29,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:20:29,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:20:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:20:29,562 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 12 states. [2020-10-13 05:20:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:29,721 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2020-10-13 05:20:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:20:29,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-13 05:20:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:29,722 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:20:29,722 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 05:20:29,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:20:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 05:20:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-13 05:20:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 05:20:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-13 05:20:29,740 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 56 [2020-10-13 05:20:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:29,741 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-13 05:20:29,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:20:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-13 05:20:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:20:29,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:29,742 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:29,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:20:29,743 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1010386934, now seen corresponding path program 8 times [2020-10-13 05:20:29,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:29,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283721568] [2020-10-13 05:20:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:20:34,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:20:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:20:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:20:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:34,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:34,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:34,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:34,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:34,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 05:20:34,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283721568] [2020-10-13 05:20:34,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:34,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:20:34,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820811564] [2020-10-13 05:20:34,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:20:34,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:34,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:20:34,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:34,880 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 13 states. [2020-10-13 05:20:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:35,013 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2020-10-13 05:20:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:20:35,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-13 05:20:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:35,016 INFO L225 Difference]: With dead ends: 172 [2020-10-13 05:20:35,016 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:20:35,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:20:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-10-13 05:20:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:20:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-13 05:20:35,023 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 61 [2020-10-13 05:20:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-13 05:20:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:20:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-13 05:20:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:20:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:35,025 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:35,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:20:35,025 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1575128733, now seen corresponding path program 9 times [2020-10-13 05:20:35,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:35,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982890210] [2020-10-13 05:20:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:20:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:40,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:40,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:40,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:40,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:40,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 05:20:40,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982890210] [2020-10-13 05:20:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:40,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:20:40,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857883227] [2020-10-13 05:20:40,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:20:40,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:20:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:20:40,172 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 14 states. [2020-10-13 05:20:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:40,357 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2020-10-13 05:20:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:20:40,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-13 05:20:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:40,358 INFO L225 Difference]: With dead ends: 186 [2020-10-13 05:20:40,359 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:20:40,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:20:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:20:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-10-13 05:20:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 05:20:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-13 05:20:40,367 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 66 [2020-10-13 05:20:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:40,367 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-13 05:20:40,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:20:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-13 05:20:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:20:40,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:40,368 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:40,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:20:40,369 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 477411366, now seen corresponding path program 10 times [2020-10-13 05:20:40,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:40,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242941422] [2020-10-13 05:20:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:20:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:45,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 05:20:45,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242941422] [2020-10-13 05:20:45,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:45,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:20:45,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34040618] [2020-10-13 05:20:45,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:20:45,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:20:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:20:45,525 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 15 states. [2020-10-13 05:20:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:45,738 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2020-10-13 05:20:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:20:45,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-13 05:20:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:45,740 INFO L225 Difference]: With dead ends: 200 [2020-10-13 05:20:45,740 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 05:20:45,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:20:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 05:20:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-10-13 05:20:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 05:20:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2020-10-13 05:20:45,750 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 71 [2020-10-13 05:20:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:45,751 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2020-10-13 05:20:45,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:20:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2020-10-13 05:20:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:20:45,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:45,756 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:45,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:20:45,756 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash -713423231, now seen corresponding path program 11 times [2020-10-13 05:20:45,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:45,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152728399] [2020-10-13 05:20:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:50,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:20:50,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:20:50,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:20:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:20:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:50,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:50,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:50,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:50,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:50,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:50,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:50,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:20:50,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152728399] [2020-10-13 05:20:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:20:50,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042301657] [2020-10-13 05:20:50,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:20:50,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:20:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:50,952 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 16 states. [2020-10-13 05:20:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:51,194 INFO L93 Difference]: Finished difference Result 214 states and 250 transitions. [2020-10-13 05:20:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:20:51,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-13 05:20:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:51,196 INFO L225 Difference]: With dead ends: 214 [2020-10-13 05:20:51,196 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:20:51,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:20:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2020-10-13 05:20:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 05:20:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-10-13 05:20:51,206 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 76 [2020-10-13 05:20:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:51,207 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-10-13 05:20:51,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:20:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-10-13 05:20:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:20:51,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:51,208 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:51,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:20:51,209 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1650407490, now seen corresponding path program 12 times [2020-10-13 05:20:51,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:51,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490145356] [2020-10-13 05:20:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:51,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:51,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:56,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:20:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:56,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:20:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490145356] [2020-10-13 05:20:56,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:56,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:20:56,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100248336] [2020-10-13 05:20:56,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:20:56,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:20:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:56,393 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 17 states. [2020-10-13 05:20:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:56,630 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-10-13 05:20:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:20:56,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-13 05:20:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:56,632 INFO L225 Difference]: With dead ends: 228 [2020-10-13 05:20:56,632 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 05:20:56,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 05:20:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-10-13 05:20:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:20:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2020-10-13 05:20:56,640 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 81 [2020-10-13 05:20:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:56,640 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2020-10-13 05:20:56,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:20:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2020-10-13 05:20:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:20:56,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:56,641 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:56,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:20:56,641 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1261035931, now seen corresponding path program 13 times [2020-10-13 05:20:56,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:56,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12046354] [2020-10-13 05:20:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:21:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:21:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:21:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:21:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 05:21:01,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12046354] [2020-10-13 05:21:01,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:01,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:21:01,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470482079] [2020-10-13 05:21:01,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:21:01,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:21:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:01,836 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 18 states. [2020-10-13 05:21:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:02,101 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2020-10-13 05:21:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:21:02,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-13 05:21:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:02,103 INFO L225 Difference]: With dead ends: 242 [2020-10-13 05:21:02,103 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:21:02,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:21:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-13 05:21:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 05:21:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2020-10-13 05:21:02,112 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 86 [2020-10-13 05:21:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:02,112 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2020-10-13 05:21:02,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:21:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2020-10-13 05:21:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 05:21:02,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:02,113 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:02,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:21:02,114 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -198969250, now seen corresponding path program 14 times [2020-10-13 05:21:02,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:02,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103010549] [2020-10-13 05:21:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:07,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:21:07,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:07,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:21:07,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:21:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:21:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:07,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:07,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:07,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:07,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:07,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:07,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:07,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:07,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 05:21:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103010549] [2020-10-13 05:21:07,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:07,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:21:07,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625075501] [2020-10-13 05:21:07,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:21:07,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:07,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:21:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:07,335 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand 19 states. [2020-10-13 05:21:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:07,599 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2020-10-13 05:21:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:21:07,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-10-13 05:21:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:07,602 INFO L225 Difference]: With dead ends: 256 [2020-10-13 05:21:07,602 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 05:21:07,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 05:21:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-10-13 05:21:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 05:21:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2020-10-13 05:21:07,610 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 91 [2020-10-13 05:21:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:07,610 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2020-10-13 05:21:07,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:21:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2020-10-13 05:21:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 05:21:07,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:07,611 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:07,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:21:07,611 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1197926839, now seen corresponding path program 15 times [2020-10-13 05:21:07,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:07,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012885008] [2020-10-13 05:21:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:07,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:09,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:12,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:21:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:21:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 05:21:12,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012885008] [2020-10-13 05:21:12,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:12,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:21:12,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537646943] [2020-10-13 05:21:12,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:21:12,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:12,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:21:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:21:12,864 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand 20 states. [2020-10-13 05:21:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:13,137 INFO L93 Difference]: Finished difference Result 270 states and 314 transitions. [2020-10-13 05:21:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:21:13,139 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-10-13 05:21:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:13,141 INFO L225 Difference]: With dead ends: 270 [2020-10-13 05:21:13,141 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 05:21:13,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:21:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 05:21:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2020-10-13 05:21:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 05:21:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2020-10-13 05:21:13,154 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 96 [2020-10-13 05:21:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:13,154 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2020-10-13 05:21:13,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:21:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2020-10-13 05:21:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:21:13,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:13,160 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:13,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:21:13,161 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1595885446, now seen corresponding path program 16 times [2020-10-13 05:21:13,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:13,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571204509] [2020-10-13 05:21:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:21:18,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:18,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:18,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:18,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:18,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 05:21:18,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571204509] [2020-10-13 05:21:18,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:18,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:21:18,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706289426] [2020-10-13 05:21:18,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:21:18,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:21:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:18,440 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand 21 states. [2020-10-13 05:21:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:18,726 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2020-10-13 05:21:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:21:18,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 101 [2020-10-13 05:21:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:18,729 INFO L225 Difference]: With dead ends: 284 [2020-10-13 05:21:18,729 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:21:18,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:21:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-10-13 05:21:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 05:21:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-10-13 05:21:18,737 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 101 [2020-10-13 05:21:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:18,737 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-10-13 05:21:18,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:21:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-10-13 05:21:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 05:21:18,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:18,739 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:18,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:21:18,739 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:18,740 INFO L82 PathProgramCache]: Analyzing trace with hash -555405779, now seen corresponding path program 17 times [2020-10-13 05:21:18,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:18,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045694245] [2020-10-13 05:21:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:23,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:23,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 05:21:23,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:23,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 05:21:23,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:21:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:21:23,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:24,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:24,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 05:21:24,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045694245] [2020-10-13 05:21:24,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:24,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:21:24,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114555430] [2020-10-13 05:21:24,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:21:24,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:21:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:24,065 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 22 states. [2020-10-13 05:21:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:24,369 INFO L93 Difference]: Finished difference Result 298 states and 346 transitions. [2020-10-13 05:21:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:21:24,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-10-13 05:21:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:24,371 INFO L225 Difference]: With dead ends: 298 [2020-10-13 05:21:24,371 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 05:21:24,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 05:21:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2020-10-13 05:21:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 05:21:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 195 transitions. [2020-10-13 05:21:24,379 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 195 transitions. Word has length 106 [2020-10-13 05:21:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:24,380 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 195 transitions. [2020-10-13 05:21:24,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:21:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 195 transitions. [2020-10-13 05:21:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 05:21:24,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:24,381 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:24,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:21:24,382 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1144207510, now seen corresponding path program 18 times [2020-10-13 05:21:24,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:24,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532666429] [2020-10-13 05:21:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:29,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:29,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:21:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:29,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:29,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:29,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 05:21:29,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532666429] [2020-10-13 05:21:29,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:29,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:21:29,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294703357] [2020-10-13 05:21:29,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:21:29,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:21:29,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:21:29,945 INFO L87 Difference]: Start difference. First operand 172 states and 195 transitions. Second operand 23 states. [2020-10-13 05:21:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:30,245 INFO L93 Difference]: Finished difference Result 312 states and 362 transitions. [2020-10-13 05:21:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:21:30,247 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-13 05:21:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:30,248 INFO L225 Difference]: With dead ends: 312 [2020-10-13 05:21:30,248 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 05:21:30,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:21:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 05:21:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2020-10-13 05:21:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 05:21:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-13 05:21:30,269 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 111 [2020-10-13 05:21:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:30,270 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-13 05:21:30,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:21:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-13 05:21:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:21:30,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:30,273 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:30,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:21:30,274 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash -883120623, now seen corresponding path program 19 times [2020-10-13 05:21:30,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:30,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461931948] [2020-10-13 05:21:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:30,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:35,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:21:35,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:35,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:35,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:35,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 05:21:35,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461931948] [2020-10-13 05:21:35,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:35,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:21:35,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525176788] [2020-10-13 05:21:35,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:21:35,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:21:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:21:35,654 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 24 states. [2020-10-13 05:21:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:35,946 INFO L93 Difference]: Finished difference Result 326 states and 378 transitions. [2020-10-13 05:21:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:21:35,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-10-13 05:21:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:35,948 INFO L225 Difference]: With dead ends: 326 [2020-10-13 05:21:35,949 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 05:21:35,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:21:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 05:21:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-10-13 05:21:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 05:21:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2020-10-13 05:21:35,958 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 116 [2020-10-13 05:21:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:35,958 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2020-10-13 05:21:35,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:21:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2020-10-13 05:21:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 05:21:35,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:35,960 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:35,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:21:35,960 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1647917234, now seen corresponding path program 20 times [2020-10-13 05:21:35,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:35,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963048011] [2020-10-13 05:21:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:35,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:41,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:21:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:41,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:41,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:41,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:41,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:41,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 05:21:41,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963048011] [2020-10-13 05:21:41,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:41,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:21:41,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527590116] [2020-10-13 05:21:41,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:21:41,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:21:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:41,421 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand 25 states. [2020-10-13 05:21:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:41,724 INFO L93 Difference]: Finished difference Result 340 states and 394 transitions. [2020-10-13 05:21:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:21:41,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-13 05:21:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:41,726 INFO L225 Difference]: With dead ends: 340 [2020-10-13 05:21:41,727 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 05:21:41,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 05:21:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-13 05:21:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 05:21:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2020-10-13 05:21:41,734 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 121 [2020-10-13 05:21:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:41,735 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2020-10-13 05:21:41,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:21:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2020-10-13 05:21:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:21:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:41,737 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:41,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:21:41,737 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 723631605, now seen corresponding path program 21 times [2020-10-13 05:21:41,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:41,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450250476] [2020-10-13 05:21:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:21:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:21:46,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:47,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:47,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:47,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:47,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:47,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 05:21:47,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450250476] [2020-10-13 05:21:47,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:47,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:21:47,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407025366] [2020-10-13 05:21:47,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:21:47,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:21:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:47,113 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand 26 states. [2020-10-13 05:21:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:47,413 INFO L93 Difference]: Finished difference Result 354 states and 410 transitions. [2020-10-13 05:21:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:21:47,413 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-10-13 05:21:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:47,414 INFO L225 Difference]: With dead ends: 354 [2020-10-13 05:21:47,414 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 05:21:47,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 05:21:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2020-10-13 05:21:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 05:21:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-10-13 05:21:47,422 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 126 [2020-10-13 05:21:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:47,422 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-10-13 05:21:47,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:21:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-10-13 05:21:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 05:21:47,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:47,424 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:47,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:21:47,425 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1013942066, now seen corresponding path program 22 times [2020-10-13 05:21:47,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:47,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838512832] [2020-10-13 05:21:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:21:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:52,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:21:52,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:52,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:52,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:52,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:52,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:52,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:52,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 05:21:52,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838512832] [2020-10-13 05:21:52,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:52,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:21:52,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959158581] [2020-10-13 05:21:52,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:21:52,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:21:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:52,834 INFO L87 Difference]: Start difference. First operand 204 states and 231 transitions. Second operand 27 states. [2020-10-13 05:21:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:53,198 INFO L93 Difference]: Finished difference Result 368 states and 426 transitions. [2020-10-13 05:21:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:21:53,199 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-10-13 05:21:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:53,200 INFO L225 Difference]: With dead ends: 368 [2020-10-13 05:21:53,200 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 05:21:53,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 05:21:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2020-10-13 05:21:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 05:21:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 240 transitions. [2020-10-13 05:21:53,208 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 240 transitions. Word has length 131 [2020-10-13 05:21:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:53,208 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 240 transitions. [2020-10-13 05:21:53,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:21:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 240 transitions. [2020-10-13 05:21:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:21:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:53,210 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:21:53,211 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash 416724441, now seen corresponding path program 23 times [2020-10-13 05:21:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:53,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624848297] [2020-10-13 05:21:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:53,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:21:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:58,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:21:58,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:58,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:58,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:58,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:58,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 05:21:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624848297] [2020-10-13 05:21:58,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:58,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:21:58,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531138708] [2020-10-13 05:21:58,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:21:58,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:21:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:58,733 INFO L87 Difference]: Start difference. First operand 212 states and 240 transitions. Second operand 28 states. [2020-10-13 05:21:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:59,142 INFO L93 Difference]: Finished difference Result 382 states and 442 transitions. [2020-10-13 05:21:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:21:59,142 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-10-13 05:21:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:59,144 INFO L225 Difference]: With dead ends: 382 [2020-10-13 05:21:59,145 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 05:21:59,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 05:21:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2020-10-13 05:21:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 05:21:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2020-10-13 05:21:59,159 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 136 [2020-10-13 05:21:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:59,160 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2020-10-13 05:21:59,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:21:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2020-10-13 05:21:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 05:21:59,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:59,162 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:59,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:21:59,162 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 290896106, now seen corresponding path program 24 times [2020-10-13 05:21:59,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:59,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616176879] [2020-10-13 05:21:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:59,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:04,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:04,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 05:22:04,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:04,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 05:22:04,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:22:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:22:04,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:04,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 05:22:04,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616176879] [2020-10-13 05:22:04,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:04,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:22:04,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961171976] [2020-10-13 05:22:04,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:22:04,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:22:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:04,646 INFO L87 Difference]: Start difference. First operand 220 states and 249 transitions. Second operand 29 states. [2020-10-13 05:22:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:04,970 INFO L93 Difference]: Finished difference Result 396 states and 458 transitions. [2020-10-13 05:22:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:22:04,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-13 05:22:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:04,973 INFO L225 Difference]: With dead ends: 396 [2020-10-13 05:22:04,973 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 05:22:04,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 05:22:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 228. [2020-10-13 05:22:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 05:22:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 258 transitions. [2020-10-13 05:22:04,982 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 258 transitions. Word has length 141 [2020-10-13 05:22:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:04,982 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 258 transitions. [2020-10-13 05:22:04,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:22:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 258 transitions. [2020-10-13 05:22:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 05:22:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:04,984 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:04,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:22:04,984 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2137141827, now seen corresponding path program 25 times [2020-10-13 05:22:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:04,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862644339] [2020-10-13 05:22:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:05,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:10,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 05:22:10,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:22:10,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:10,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:10,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 05:22:10,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862644339] [2020-10-13 05:22:10,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:10,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:22:10,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472250760] [2020-10-13 05:22:10,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:22:10,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:22:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:22:10,436 INFO L87 Difference]: Start difference. First operand 228 states and 258 transitions. Second operand 30 states. [2020-10-13 05:22:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:10,838 INFO L93 Difference]: Finished difference Result 410 states and 474 transitions. [2020-10-13 05:22:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:22:10,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-10-13 05:22:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:10,840 INFO L225 Difference]: With dead ends: 410 [2020-10-13 05:22:10,840 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 05:22:10,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:22:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 05:22:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 236. [2020-10-13 05:22:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-13 05:22:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2020-10-13 05:22:10,852 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 146 [2020-10-13 05:22:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:10,852 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2020-10-13 05:22:10,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:22:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2020-10-13 05:22:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 05:22:10,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:10,854 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:10,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:22:10,854 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1898559750, now seen corresponding path program 26 times [2020-10-13 05:22:10,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:10,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343241976] [2020-10-13 05:22:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:15,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:15,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 05:22:15,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:15,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 05:22:15,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:22:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:22:15,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:16,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:16,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:16,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:16,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 05:22:16,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343241976] [2020-10-13 05:22:16,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:16,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:22:16,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967001265] [2020-10-13 05:22:16,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:22:16,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:22:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:22:16,425 INFO L87 Difference]: Start difference. First operand 236 states and 267 transitions. Second operand 31 states. [2020-10-13 05:22:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:16,796 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2020-10-13 05:22:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:22:16,796 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 151 [2020-10-13 05:22:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:16,798 INFO L225 Difference]: With dead ends: 424 [2020-10-13 05:22:16,798 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 05:22:16,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:22:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 05:22:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2020-10-13 05:22:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 05:22:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2020-10-13 05:22:16,810 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 151 [2020-10-13 05:22:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:16,810 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2020-10-13 05:22:16,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:22:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2020-10-13 05:22:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 05:22:16,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:16,811 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:16,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:22:16,812 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:16,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2078718559, now seen corresponding path program 27 times [2020-10-13 05:22:16,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:16,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611688651] [2020-10-13 05:22:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:22:21,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:21,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:22:21,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:22,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:22,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:22,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 05:22:22,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611688651] [2020-10-13 05:22:22,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:22,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:22:22,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969506195] [2020-10-13 05:22:22,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:22:22,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:22:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:22:22,350 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand 32 states. [2020-10-13 05:22:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:22,716 INFO L93 Difference]: Finished difference Result 438 states and 506 transitions. [2020-10-13 05:22:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:22:22,716 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-13 05:22:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:22,718 INFO L225 Difference]: With dead ends: 438 [2020-10-13 05:22:22,718 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 05:22:22,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:22:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 05:22:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-10-13 05:22:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 05:22:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 285 transitions. [2020-10-13 05:22:22,727 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 285 transitions. Word has length 156 [2020-10-13 05:22:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:22,727 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 285 transitions. [2020-10-13 05:22:22,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:22:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 285 transitions. [2020-10-13 05:22:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 05:22:22,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:22,729 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:22,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:22:22,730 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash 556218658, now seen corresponding path program 28 times [2020-10-13 05:22:22,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:22,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904245644] [2020-10-13 05:22:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:22:27,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:28,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:28,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:28,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:28,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:28,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 05:22:28,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904245644] [2020-10-13 05:22:28,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:28,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:22:28,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026852946] [2020-10-13 05:22:28,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:22:28,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:22:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:28,321 INFO L87 Difference]: Start difference. First operand 252 states and 285 transitions. Second operand 33 states. [2020-10-13 05:22:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:28,740 INFO L93 Difference]: Finished difference Result 452 states and 522 transitions. [2020-10-13 05:22:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:22:28,740 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2020-10-13 05:22:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:28,742 INFO L225 Difference]: With dead ends: 452 [2020-10-13 05:22:28,742 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 05:22:28,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 05:22:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-10-13 05:22:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 05:22:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 294 transitions. [2020-10-13 05:22:28,752 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 294 transitions. Word has length 161 [2020-10-13 05:22:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:28,753 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 294 transitions. [2020-10-13 05:22:28,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:22:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 294 transitions. [2020-10-13 05:22:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 05:22:28,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:28,754 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:28,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:22:28,755 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -563389051, now seen corresponding path program 29 times [2020-10-13 05:22:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19268705] [2020-10-13 05:22:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:28,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:33,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 05:22:33,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-13 05:22:33,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:22:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:22:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:34,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:34,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:34,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 05:22:34,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19268705] [2020-10-13 05:22:34,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:34,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:22:34,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588976593] [2020-10-13 05:22:34,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:22:34,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:22:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:22:34,485 INFO L87 Difference]: Start difference. First operand 260 states and 294 transitions. Second operand 34 states. [2020-10-13 05:22:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:34,936 INFO L93 Difference]: Finished difference Result 466 states and 538 transitions. [2020-10-13 05:22:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:22:34,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 166 [2020-10-13 05:22:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:34,939 INFO L225 Difference]: With dead ends: 466 [2020-10-13 05:22:34,939 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 05:22:34,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:22:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 05:22:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 268. [2020-10-13 05:22:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 05:22:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 303 transitions. [2020-10-13 05:22:34,954 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 303 transitions. Word has length 166 [2020-10-13 05:22:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:34,955 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 303 transitions. [2020-10-13 05:22:34,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:22:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 303 transitions. [2020-10-13 05:22:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 05:22:34,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:34,958 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:34,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:22:34,959 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash 334297406, now seen corresponding path program 30 times [2020-10-13 05:22:34,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924277862] [2020-10-13 05:22:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:35,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:40,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:40,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 05:22:40,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:22:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:40,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 05:22:40,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924277862] [2020-10-13 05:22:40,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:40,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:22:40,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068460531] [2020-10-13 05:22:40,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:22:40,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:22:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:40,719 INFO L87 Difference]: Start difference. First operand 268 states and 303 transitions. Second operand 35 states. [2020-10-13 05:22:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:41,191 INFO L93 Difference]: Finished difference Result 480 states and 554 transitions. [2020-10-13 05:22:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:22:41,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 171 [2020-10-13 05:22:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:41,194 INFO L225 Difference]: With dead ends: 480 [2020-10-13 05:22:41,194 INFO L226 Difference]: Without dead ends: 281 [2020-10-13 05:22:41,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-13 05:22:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 276. [2020-10-13 05:22:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 05:22:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 312 transitions. [2020-10-13 05:22:41,208 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 312 transitions. Word has length 171 [2020-10-13 05:22:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:41,209 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 312 transitions. [2020-10-13 05:22:41,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:22:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 312 transitions. [2020-10-13 05:22:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 05:22:41,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:41,211 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:41,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:22:41,212 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1211520361, now seen corresponding path program 31 times [2020-10-13 05:22:41,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:41,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372461394] [2020-10-13 05:22:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:22:46,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:46,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:46,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:46,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:46,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:46,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 05:22:46,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372461394] [2020-10-13 05:22:46,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:46,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:22:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252156555] [2020-10-13 05:22:46,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:22:46,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:22:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:46,988 INFO L87 Difference]: Start difference. First operand 276 states and 312 transitions. Second operand 36 states. [2020-10-13 05:22:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:47,422 INFO L93 Difference]: Finished difference Result 494 states and 570 transitions. [2020-10-13 05:22:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:22:47,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-10-13 05:22:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:47,424 INFO L225 Difference]: With dead ends: 494 [2020-10-13 05:22:47,424 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 05:22:47,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 05:22:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 284. [2020-10-13 05:22:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 05:22:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 321 transitions. [2020-10-13 05:22:47,433 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 321 transitions. Word has length 176 [2020-10-13 05:22:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:47,433 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 321 transitions. [2020-10-13 05:22:47,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:22:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 321 transitions. [2020-10-13 05:22:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 05:22:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:47,435 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:47,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:22:47,435 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1936148134, now seen corresponding path program 32 times [2020-10-13 05:22:47,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:47,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014467491] [2020-10-13 05:22:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:22:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:53,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:53,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:53,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:53,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:53,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 05:22:53,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014467491] [2020-10-13 05:22:53,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:53,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:22:53,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156410482] [2020-10-13 05:22:53,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:22:53,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:22:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:53,385 INFO L87 Difference]: Start difference. First operand 284 states and 321 transitions. Second operand 37 states. [2020-10-13 05:22:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:53,856 INFO L93 Difference]: Finished difference Result 508 states and 586 transitions. [2020-10-13 05:22:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:22:53,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 181 [2020-10-13 05:22:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:53,859 INFO L225 Difference]: With dead ends: 508 [2020-10-13 05:22:53,859 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 05:22:53,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 05:22:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 292. [2020-10-13 05:22:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-13 05:22:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-10-13 05:22:53,869 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 181 [2020-10-13 05:22:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:53,869 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-10-13 05:22:53,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:22:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-10-13 05:22:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 05:22:53,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:53,871 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:53,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:22:53,872 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:53,872 INFO L82 PathProgramCache]: Analyzing trace with hash -610505395, now seen corresponding path program 33 times [2020-10-13 05:22:53,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:53,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406063609] [2020-10-13 05:22:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:59,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5202 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:22:59,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:59,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:59,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:59,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:59,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:59,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:59,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 05:22:59,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406063609] [2020-10-13 05:22:59,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:59,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:22:59,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566386804] [2020-10-13 05:22:59,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:22:59,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:22:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:22:59,822 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 38 states. [2020-10-13 05:23:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:00,251 INFO L93 Difference]: Finished difference Result 522 states and 602 transitions. [2020-10-13 05:23:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:23:00,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 186 [2020-10-13 05:23:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:00,254 INFO L225 Difference]: With dead ends: 522 [2020-10-13 05:23:00,254 INFO L226 Difference]: Without dead ends: 305 [2020-10-13 05:23:00,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:23:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-13 05:23:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 300. [2020-10-13 05:23:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-13 05:23:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 339 transitions. [2020-10-13 05:23:00,265 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 339 transitions. Word has length 186 [2020-10-13 05:23:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:00,265 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 339 transitions. [2020-10-13 05:23:00,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:23:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 339 transitions. [2020-10-13 05:23:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 05:23:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:00,267 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:00,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:23:00,267 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1161283210, now seen corresponding path program 34 times [2020-10-13 05:23:00,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:00,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026464769] [2020-10-13 05:23:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:00,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 05:23:05,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:05,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5277 [2020-10-13 05:23:05,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:23:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:23:05,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:06,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:06,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:06,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:06,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:06,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:06,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 05:23:06,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026464769] [2020-10-13 05:23:06,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:06,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:23:06,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22095797] [2020-10-13 05:23:06,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:23:06,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:23:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:06,348 INFO L87 Difference]: Start difference. First operand 300 states and 339 transitions. Second operand 39 states. [2020-10-13 05:23:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:06,819 INFO L93 Difference]: Finished difference Result 536 states and 618 transitions. [2020-10-13 05:23:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:23:06,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 191 [2020-10-13 05:23:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:06,823 INFO L225 Difference]: With dead ends: 536 [2020-10-13 05:23:06,824 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 05:23:06,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 05:23:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-10-13 05:23:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 05:23:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 348 transitions. [2020-10-13 05:23:06,832 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 348 transitions. Word has length 191 [2020-10-13 05:23:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:06,832 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 348 transitions. [2020-10-13 05:23:06,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:23:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 348 transitions. [2020-10-13 05:23:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-13 05:23:06,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:06,834 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:06,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:23:06,834 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 2017453361, now seen corresponding path program 35 times [2020-10-13 05:23:06,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:06,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368628013] [2020-10-13 05:23:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:23:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 05:23:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:12,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:12,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:12,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:12,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:12,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:12,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-13 05:23:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368628013] [2020-10-13 05:23:12,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:12,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:23:12,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206441832] [2020-10-13 05:23:12,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:23:12,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:23:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:23:12,818 INFO L87 Difference]: Start difference. First operand 308 states and 348 transitions. Second operand 40 states. [2020-10-13 05:23:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:13,415 INFO L93 Difference]: Finished difference Result 550 states and 634 transitions. [2020-10-13 05:23:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:23:13,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 196 [2020-10-13 05:23:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:13,418 INFO L225 Difference]: With dead ends: 550 [2020-10-13 05:23:13,418 INFO L226 Difference]: Without dead ends: 321 [2020-10-13 05:23:13,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:23:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-13 05:23:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-10-13 05:23:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-13 05:23:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 357 transitions. [2020-10-13 05:23:13,426 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 357 transitions. Word has length 196 [2020-10-13 05:23:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:13,426 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 357 transitions. [2020-10-13 05:23:13,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:23:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 357 transitions. [2020-10-13 05:23:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 05:23:13,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:13,428 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:13,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:23:13,428 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1452882322, now seen corresponding path program 36 times [2020-10-13 05:23:13,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:13,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66507439] [2020-10-13 05:23:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:13,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 05:23:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:19,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:19,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:19,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:19,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:19,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-13 05:23:19,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66507439] [2020-10-13 05:23:19,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:19,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:23:19,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455703536] [2020-10-13 05:23:19,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:23:19,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:23:19,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:23:19,415 INFO L87 Difference]: Start difference. First operand 316 states and 357 transitions. Second operand 41 states. [2020-10-13 05:23:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:19,879 INFO L93 Difference]: Finished difference Result 564 states and 650 transitions. [2020-10-13 05:23:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:23:19,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 201 [2020-10-13 05:23:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:19,882 INFO L225 Difference]: With dead ends: 564 [2020-10-13 05:23:19,882 INFO L226 Difference]: Without dead ends: 329 [2020-10-13 05:23:19,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:23:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-13 05:23:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2020-10-13 05:23:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 05:23:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 366 transitions. [2020-10-13 05:23:19,891 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 366 transitions. Word has length 201 [2020-10-13 05:23:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:19,891 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 366 transitions. [2020-10-13 05:23:19,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:23:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 366 transitions. [2020-10-13 05:23:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-13 05:23:19,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:19,893 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:19,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:23:19,893 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:19,894 INFO L82 PathProgramCache]: Analyzing trace with hash 658701589, now seen corresponding path program 37 times [2020-10-13 05:23:19,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:19,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453153813] [2020-10-13 05:23:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:19,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:24,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:23:24,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:25,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:25,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:25,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:25,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:25,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:25,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-13 05:23:25,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453153813] [2020-10-13 05:23:25,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:25,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:23:25,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233894201] [2020-10-13 05:23:25,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:23:25,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:23:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:23:25,873 INFO L87 Difference]: Start difference. First operand 324 states and 366 transitions. Second operand 42 states. [2020-10-13 05:23:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:26,472 INFO L93 Difference]: Finished difference Result 578 states and 666 transitions. [2020-10-13 05:23:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:23:26,472 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 206 [2020-10-13 05:23:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:26,475 INFO L225 Difference]: With dead ends: 578 [2020-10-13 05:23:26,475 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 05:23:26,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:23:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 05:23:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 332. [2020-10-13 05:23:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-13 05:23:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 375 transitions. [2020-10-13 05:23:26,484 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 375 transitions. Word has length 206 [2020-10-13 05:23:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:26,484 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 375 transitions. [2020-10-13 05:23:26,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:23:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 375 transitions. [2020-10-13 05:23:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 05:23:26,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:26,486 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:26,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:23:26,486 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:26,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1017739694, now seen corresponding path program 38 times [2020-10-13 05:23:26,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:26,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652844363] [2020-10-13 05:23:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:31,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:31,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 05:23:31,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 05:23:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:32,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:32,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:32,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:32,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:32,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:32,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:32,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:32,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-13 05:23:32,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652844363] [2020-10-13 05:23:32,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:32,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:23:32,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058579203] [2020-10-13 05:23:32,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:23:32,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:23:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:23:32,500 INFO L87 Difference]: Start difference. First operand 332 states and 375 transitions. Second operand 43 states. [2020-10-13 05:23:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:33,122 INFO L93 Difference]: Finished difference Result 592 states and 682 transitions. [2020-10-13 05:23:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:23:33,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 211 [2020-10-13 05:23:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:33,124 INFO L225 Difference]: With dead ends: 592 [2020-10-13 05:23:33,124 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 05:23:33,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:23:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 05:23:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 340. [2020-10-13 05:23:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 05:23:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 384 transitions. [2020-10-13 05:23:33,134 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 384 transitions. Word has length 211 [2020-10-13 05:23:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:33,135 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 384 transitions. [2020-10-13 05:23:33,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:23:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 384 transitions. [2020-10-13 05:23:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-13 05:23:33,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:33,137 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:33,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:23:33,137 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2135422201, now seen corresponding path program 39 times [2020-10-13 05:23:33,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:33,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100828914] [2020-10-13 05:23:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:38,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-13 05:23:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-13 05:23:38,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:23:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 05:23:38,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:39,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:39,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:39,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:39,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:39,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:39,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:39,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:39,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-13 05:23:39,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100828914] [2020-10-13 05:23:39,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:39,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:23:39,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813156646] [2020-10-13 05:23:39,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:23:39,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:39,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:23:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:23:39,359 INFO L87 Difference]: Start difference. First operand 340 states and 384 transitions. Second operand 44 states. [2020-10-13 05:23:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:39,946 INFO L93 Difference]: Finished difference Result 606 states and 698 transitions. [2020-10-13 05:23:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:23:39,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 216 [2020-10-13 05:23:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:39,949 INFO L225 Difference]: With dead ends: 606 [2020-10-13 05:23:39,950 INFO L226 Difference]: Without dead ends: 353 [2020-10-13 05:23:39,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:23:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-13 05:23:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 348. [2020-10-13 05:23:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-13 05:23:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 393 transitions. [2020-10-13 05:23:39,959 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 393 transitions. Word has length 216 [2020-10-13 05:23:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:39,959 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 393 transitions. [2020-10-13 05:23:39,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:23:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 393 transitions. [2020-10-13 05:23:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 05:23:39,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:39,961 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:39,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:23:39,961 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash 169261514, now seen corresponding path program 40 times [2020-10-13 05:23:39,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:39,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372241625] [2020-10-13 05:23:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:40,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:40,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:45,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:45,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 05:23:45,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:45,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-13 05:23:45,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:23:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 05:23:45,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:46,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:46,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-10-13 05:23:46,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372241625] [2020-10-13 05:23:46,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:46,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:23:46,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855818747] [2020-10-13 05:23:46,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:23:46,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:23:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:23:46,075 INFO L87 Difference]: Start difference. First operand 348 states and 393 transitions. Second operand 45 states. [2020-10-13 05:23:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:46,716 INFO L93 Difference]: Finished difference Result 620 states and 714 transitions. [2020-10-13 05:23:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:23:46,716 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 221 [2020-10-13 05:23:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:46,718 INFO L225 Difference]: With dead ends: 620 [2020-10-13 05:23:46,719 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 05:23:46,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:23:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 05:23:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2020-10-13 05:23:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 05:23:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 402 transitions. [2020-10-13 05:23:46,728 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 402 transitions. Word has length 221 [2020-10-13 05:23:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:46,728 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 402 transitions. [2020-10-13 05:23:46,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:23:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 402 transitions. [2020-10-13 05:23:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-13 05:23:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:46,730 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:46,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:23:46,730 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 141626589, now seen corresponding path program 41 times [2020-10-13 05:23:46,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:46,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031437325] [2020-10-13 05:23:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:51,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:51,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-13 05:23:51,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:23:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:52,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:52,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:52,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:52,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-10-13 05:23:53,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031437325] [2020-10-13 05:23:53,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:53,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:23:53,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136051967] [2020-10-13 05:23:53,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:23:53,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:23:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:23:53,021 INFO L87 Difference]: Start difference. First operand 356 states and 402 transitions. Second operand 46 states. [2020-10-13 05:23:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:53,564 INFO L93 Difference]: Finished difference Result 634 states and 730 transitions. [2020-10-13 05:23:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:23:53,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 226 [2020-10-13 05:23:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:53,566 INFO L225 Difference]: With dead ends: 634 [2020-10-13 05:23:53,566 INFO L226 Difference]: Without dead ends: 369 [2020-10-13 05:23:53,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:23:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-13 05:23:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-10-13 05:23:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-13 05:23:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2020-10-13 05:23:53,576 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 226 [2020-10-13 05:23:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:53,576 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2020-10-13 05:23:53,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:23:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2020-10-13 05:23:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 05:23:53,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:53,578 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:53,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:23:53,578 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1199654426, now seen corresponding path program 42 times [2020-10-13 05:23:53,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:53,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589554719] [2020-10-13 05:23:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:53,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:58,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:58,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 05:23:58,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:58,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-13 05:23:58,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:58,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:23:58,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:58,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 05:23:58,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:59,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:59,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-10-13 05:23:59,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589554719] [2020-10-13 05:23:59,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:59,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:23:59,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724549142] [2020-10-13 05:23:59,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:23:59,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:23:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:23:59,848 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand 47 states. [2020-10-13 05:24:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:00,415 INFO L93 Difference]: Finished difference Result 648 states and 746 transitions. [2020-10-13 05:24:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:24:00,416 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 231 [2020-10-13 05:24:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:00,418 INFO L225 Difference]: With dead ends: 648 [2020-10-13 05:24:00,418 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 05:24:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:24:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 05:24:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-10-13 05:24:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-13 05:24:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 420 transitions. [2020-10-13 05:24:00,427 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 420 transitions. Word has length 231 [2020-10-13 05:24:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:00,427 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 420 transitions. [2020-10-13 05:24:00,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:24:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 420 transitions. [2020-10-13 05:24:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 05:24:00,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:00,429 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:00,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:24:00,429 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1604287295, now seen corresponding path program 43 times [2020-10-13 05:24:00,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:00,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013766888] [2020-10-13 05:24:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:05,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 05:24:05,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:06,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:06,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [2020-10-13 05:24:06,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013766888] [2020-10-13 05:24:06,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:06,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 05:24:06,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948520419] [2020-10-13 05:24:06,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 05:24:06,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 05:24:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:24:06,707 INFO L87 Difference]: Start difference. First operand 372 states and 420 transitions. Second operand 48 states.