/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=BIGGEST --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-fpi/ms3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:33,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:33,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:33,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:33,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:33,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:33,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:33,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:33,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:33,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:33,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:33,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:33,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:33,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:33,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:33,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:33,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:33,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:33,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:33,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:33,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:33,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:33,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:33,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:33,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:33,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:33,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:33,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:33,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:33,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:33,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:33,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:33,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:33,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:33,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:33,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:33,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:33,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:33,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:33,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:33,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:33,301 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 [2020-10-12 10:11:33,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:33,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:33,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:33,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:33,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:33,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:33,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:33,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:33,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:33,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:33,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:33,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:33,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:33,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:33,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:33,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:33,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:33,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:33,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:33,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:33,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:33,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:33,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:33,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:33,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:33,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:33,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:33,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:33,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:33,350 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:11:33,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:33,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:33,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:33,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:33,720 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:33,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms3.c [2020-10-12 10:11:33,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9d8f055c/709e98157a624189b21dbcdd8be524fe/FLAG135c79273 [2020-10-12 10:11:34,289 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:34,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms3.c [2020-10-12 10:11:34,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9d8f055c/709e98157a624189b21dbcdd8be524fe/FLAG135c79273 [2020-10-12 10:11:34,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9d8f055c/709e98157a624189b21dbcdd8be524fe [2020-10-12 10:11:34,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:34,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:34,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:34,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:34,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:34,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:34" (1/1) ... [2020-10-12 10:11:34,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbcaf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:34, skipping insertion in model container [2020-10-12 10:11:34,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:34" (1/1) ... [2020-10-12 10:11:34,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:34,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:35,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:35,016 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:35,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:35,058 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:35,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35 WrapperNode [2020-10-12 10:11:35,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:35,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:35,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:35,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:35,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (1/1) ... [2020-10-12 10:11:35,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:35,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:35,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:35,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:35,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (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 [2020-10-12 10:11:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:35,543 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:35,543 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:11:35,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:35 BoogieIcfgContainer [2020-10-12 10:11:35,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:35,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:35,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:35,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:35,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:34" (1/3) ... [2020-10-12 10:11:35,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73411637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:35, skipping insertion in model container [2020-10-12 10:11:35,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:35" (2/3) ... [2020-10-12 10:11:35,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73411637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:35, skipping insertion in model container [2020-10-12 10:11:35,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:35" (3/3) ... [2020-10-12 10:11:35,557 INFO L109 eAbstractionObserver]: Analyzing ICFG ms3.c [2020-10-12 10:11:35,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:35,578 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:35,595 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:35,654 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:35,654 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:35,655 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:35,655 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:35,660 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:35,660 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:35,660 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:35,660 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 10:11:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:11:35,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:35,712 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] [2020-10-12 10:11:35,713 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-12 10:11:35,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:35,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708597829] [2020-10-12 10:11:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:35,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:36,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:11:36,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-12 10:11:36,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:11:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:11:36,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:11:36,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:36,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:36,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:11:36,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:36,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:36,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:36,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:36,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:11:36,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:36,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:36,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708597829] [2020-10-12 10:11:36,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:11:36,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795419450] [2020-10-12 10:11:36,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:11:36,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:11:36,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:11:36,635 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-12 10:11:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:36,902 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-10-12 10:11:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:11:36,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 10:11:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:36,923 INFO L225 Difference]: With dead ends: 63 [2020-10-12 10:11:36,923 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 10:11:36,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:11:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 10:11:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-12 10:11:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:11:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 10:11:36,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-12 10:11:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:36,994 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 10:11:36,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:11:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 10:11:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:11:36,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:36,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:36,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:36,999 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-12 10:11:37,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:37,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938941642] [2020-10-12 10:11:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:11:37,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:37,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-12 10:11:37,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:11:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:11:37,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:37,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:11:37,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:37,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:11:37,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:37,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938941642] [2020-10-12 10:11:37,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:37,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:11:37,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522705027] [2020-10-12 10:11:37,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:11:37,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:11:37,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:11:37,723 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-12 10:11:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:37,987 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-12 10:11:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:11:37,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 10:11:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:37,990 INFO L225 Difference]: With dead ends: 38 [2020-10-12 10:11:37,990 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 10:11:37,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 10:11:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 10:11:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:11:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 10:11:37,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-12 10:11:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:38,000 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 10:11:38,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:11:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 10:11:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:38,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:38,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:38,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:11:38,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1827351009, now seen corresponding path program 1 times [2020-10-12 10:11:38,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:38,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893953098] [2020-10-12 10:11:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:38,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:39,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:39,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:11:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-12 10:11:39,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:11:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:11:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:11:39,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:40,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:40,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:40,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:11:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:40,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:40,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:40,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:40,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:40,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:40,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893953098] [2020-10-12 10:11:40,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:40,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:11:40,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145815030] [2020-10-12 10:11:40,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:11:40,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:11:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:40,471 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2020-10-12 10:11:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:41,098 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-12 10:11:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:11:41,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 10:11:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:41,100 INFO L225 Difference]: With dead ends: 41 [2020-10-12 10:11:41,101 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 10:11:41,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:11:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 10:11:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-12 10:11:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:11:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 10:11:41,110 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-10-12 10:11:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:41,111 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 10:11:41,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:11:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 10:11:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:11:41,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:41,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:41,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:11:41,114 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:41,114 INFO L82 PathProgramCache]: Analyzing trace with hash 963777163, now seen corresponding path program 2 times [2020-10-12 10:11:41,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:41,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195423960] [2020-10-12 10:11:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:11:45,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:11:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3949 [2020-10-12 10:11:45,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:11:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:11:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:45,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:45,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:45,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:45,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:45,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:45,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:45,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:45,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:45,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:45,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:45,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:45,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:45,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195423960] [2020-10-12 10:11:45,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:45,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:11:45,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108073606] [2020-10-12 10:11:45,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:11:45,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:11:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:45,269 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 12 states. [2020-10-12 10:11:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:45,507 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-12 10:11:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:11:45,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 10:11:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:45,509 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:11:45,509 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:11:45,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:11:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:11:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-12 10:11:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:11:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-12 10:11:45,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2020-10-12 10:11:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:45,517 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-12 10:11:45,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:11:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-12 10:11:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:11:45,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:45,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:45,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:11:45,519 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 3 times [2020-10-12 10:11:45,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:45,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158426741] [2020-10-12 10:11:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:48,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:11:48,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:11:48,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2687 [2020-10-12 10:11:48,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:11:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:11:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:11:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:48,723 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 10:11:49,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:49,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:49,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:49,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:49,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:49,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:49,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:49,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:49,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:49,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:49,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:49,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:49,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:49,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158426741] [2020-10-12 10:11:49,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:49,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:11:49,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966348937] [2020-10-12 10:11:49,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:11:49,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:49,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:11:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:11:49,143 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 19 states. [2020-10-12 10:11:50,226 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 10:11:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:50,791 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-12 10:11:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:11:50,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-12 10:11:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:50,792 INFO L225 Difference]: With dead ends: 47 [2020-10-12 10:11:50,793 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:11:50,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:11:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:11:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-12 10:11:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:11:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 10:11:50,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2020-10-12 10:11:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:50,801 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 10:11:50,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:11:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 10:11:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:11:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:50,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:50,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:11:50,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1738820895, now seen corresponding path program 4 times [2020-10-12 10:11:50,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:50,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460959459] [2020-10-12 10:11:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:50,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:11:54,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:11:54,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4076 [2020-10-12 10:11:54,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:11:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 10:11:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:11:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:55,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:55,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:55,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:55,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:55,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:55,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:55,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:55,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:55,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:55,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:55,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:55,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:55,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:55,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460959459] [2020-10-12 10:11:55,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:55,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:11:55,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814874584] [2020-10-12 10:11:55,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:11:55,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:11:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:11:55,633 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 18 states. [2020-10-12 10:11:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:56,797 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 10:11:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:11:56,798 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-12 10:11:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:56,799 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:11:56,799 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:11:56,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:11:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:11:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-12 10:11:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:11:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 10:11:56,812 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2020-10-12 10:11:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:56,812 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 10:11:56,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:11:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 10:11:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:11:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:56,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:56,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:11:56,814 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081823, now seen corresponding path program 5 times [2020-10-12 10:11:56,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:56,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444115638] [2020-10-12 10:11:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:01,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:01,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:12:01,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4993 [2020-10-12 10:12:01,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:12:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:12:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:02,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:02,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:02,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:02,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:02,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:02,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:02,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:02,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:12:02,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444115638] [2020-10-12 10:12:02,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:02,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:12:02,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628989477] [2020-10-12 10:12:02,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:12:02,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:12:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:12:02,024 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2020-10-12 10:12:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:02,574 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2020-10-12 10:12:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:12:02,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 10:12:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:02,577 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:12:02,577 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 10:12:02,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:12:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 10:12:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-12 10:12:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:12:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-12 10:12:02,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 37 [2020-10-12 10:12:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:02,591 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-12 10:12:02,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:12:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-12 10:12:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:02,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:02,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:02,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:02,593 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 6 times [2020-10-12 10:12:02,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:02,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016331021] [2020-10-12 10:12:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:07,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4928 [2020-10-12 10:12:07,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:12:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:12:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:08,032 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-12 10:12:08,321 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-12 10:12:09,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:09,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:09,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:09,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:09,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:09,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:09,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:09,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:09,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016331021] [2020-10-12 10:12:09,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:09,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:12:09,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235059450] [2020-10-12 10:12:09,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:12:09,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:12:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:12:09,082 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 23 states. [2020-10-12 10:12:10,236 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-12 10:12:10,898 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-12 10:12:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:11,820 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-12 10:12:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:12:11,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-12 10:12:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:11,822 INFO L225 Difference]: With dead ends: 75 [2020-10-12 10:12:11,822 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 10:12:11,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:12:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 10:12:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-12 10:12:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:12:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-12 10:12:11,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 39 [2020-10-12 10:12:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:11,838 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-12 10:12:11,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:12:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-12 10:12:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:12:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:11,840 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:11,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:11,840 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1232246457, now seen corresponding path program 7 times [2020-10-12 10:12:11,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:11,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265399188] [2020-10-12 10:12:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:16,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:12:16,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:12:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,250 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-12 10:12:19,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:19,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:19,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:19,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:19,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:19,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:19,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:19,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:12:19,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265399188] [2020-10-12 10:12:19,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:19,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:12:19,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951758979] [2020-10-12 10:12:19,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:12:19,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:12:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:12:19,676 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 18 states. [2020-10-12 10:12:19,996 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:12:20,782 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-12 10:12:21,147 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-12 10:12:21,361 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 10:12:21,569 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 10:12:21,767 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 10:12:21,976 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-12 10:12:22,182 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 10:12:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:22,287 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-12 10:12:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:12:22,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 10:12:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:22,290 INFO L225 Difference]: With dead ends: 80 [2020-10-12 10:12:22,290 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:12:22,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:12:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:12:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2020-10-12 10:12:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:12:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-12 10:12:22,301 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2020-10-12 10:12:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:22,302 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-12 10:12:22,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:12:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-12 10:12:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:12:22,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:22,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:22,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:22,304 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash 640559305, now seen corresponding path program 8 times [2020-10-12 10:12:22,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:22,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873719868] [2020-10-12 10:12:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:22,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:24,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:12:24,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:12:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:25,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:25,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:25,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 10:12:25,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873719868] [2020-10-12 10:12:25,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:25,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:12:25,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439292671] [2020-10-12 10:12:25,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:12:25,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:12:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:12:25,744 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 20 states. [2020-10-12 10:12:26,306 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 10:12:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:27,577 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 10:12:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:12:27,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-12 10:12:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:27,580 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:12:27,581 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:12:27,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:12:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:12:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-12 10:12:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:12:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-12 10:12:27,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 42 [2020-10-12 10:12:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:27,593 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-12 10:12:27,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:12:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-12 10:12:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:12:27,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:27,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:27,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:27,595 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:27,595 INFO L82 PathProgramCache]: Analyzing trace with hash -370557945, now seen corresponding path program 9 times [2020-10-12 10:12:27,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:27,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898218205] [2020-10-12 10:12:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:12:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:12:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:12:32,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:12:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:12:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:32,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:32,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:32,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:32,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:32,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:32,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:12:32,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898218205] [2020-10-12 10:12:32,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:32,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:12:32,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826141032] [2020-10-12 10:12:32,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:12:32,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:12:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:12:32,915 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 18 states. [2020-10-12 10:12:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:33,570 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-10-12 10:12:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:12:33,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 10:12:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:33,572 INFO L225 Difference]: With dead ends: 87 [2020-10-12 10:12:33,573 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:12:33,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:12:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:12:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-10-12 10:12:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:12:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-12 10:12:33,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2020-10-12 10:12:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:33,584 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-12 10:12:33,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:12:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-12 10:12:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:12:33,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:33,586 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:33,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:12:33,586 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 10 times [2020-10-12 10:12:33,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:33,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186075524] [2020-10-12 10:12:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:37,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:12:37,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:12:37,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-10-12 10:12:37,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:12:37,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:12:37,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:12:37,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:38,095 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-10-12 10:12:38,357 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2020-10-12 10:12:38,638 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 41 [2020-10-12 10:12:38,884 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2020-10-12 10:12:39,131 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-12 10:12:39,410 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-12 10:12:40,227 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 94 [2020-10-12 10:12:40,840 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 88 [2020-10-12 10:12:41,456 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 81 [2020-10-12 10:12:42,197 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 84 [2020-10-12 10:12:42,825 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 78 [2020-10-12 10:12:43,309 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 54 [2020-10-12 10:12:43,580 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 31 [2020-10-12 10:12:44,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:44,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:44,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:44,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:44,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:44,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:44,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:44,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:44,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:44,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:44,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:44,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:44,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186075524] [2020-10-12 10:12:44,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:44,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:12:44,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465094485] [2020-10-12 10:12:44,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:12:44,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:44,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:12:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:12:44,565 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 27 states. [2020-10-12 10:12:45,179 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2020-10-12 10:12:45,633 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-10-12 10:12:46,115 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2020-10-12 10:12:50,083 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 330 DAG size of output: 306 [2020-10-12 10:12:50,725 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 126 [2020-10-12 10:12:51,376 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 133 [2020-10-12 10:12:51,764 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-12 10:12:52,701 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2020-10-12 10:12:53,714 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 174 [2020-10-12 10:12:54,565 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 156 [2020-10-12 10:12:55,245 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 153 [2020-10-12 10:12:55,829 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2020-10-12 10:12:56,205 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 10:12:56,539 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-10-12 10:12:57,242 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 151 [2020-10-12 10:12:57,608 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-12 10:12:58,275 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 98 [2020-10-12 10:12:58,945 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 113 [2020-10-12 10:12:59,231 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:12:59,746 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2020-10-12 10:13:02,048 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 229 DAG size of output: 213 [2020-10-12 10:13:04,244 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 231 DAG size of output: 215 [2020-10-12 10:13:06,687 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 225 DAG size of output: 211 [2020-10-12 10:13:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:06,873 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-12 10:13:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:13:06,875 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-12 10:13:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:06,876 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:13:06,876 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:13:06,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=382, Invalid=2374, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:13:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:13:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2020-10-12 10:13:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:13:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-12 10:13:06,895 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 44 [2020-10-12 10:13:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:06,896 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-12 10:13:06,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:13:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-12 10:13:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:13:06,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:06,897 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:06,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:13:06,897 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash 325222503, now seen corresponding path program 11 times [2020-10-12 10:13:06,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:06,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757008109] [2020-10-12 10:13:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:06,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:11,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:13:11,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:13:11,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:13:11,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:11,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:13:11,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:11,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:13:11,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:12,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:12,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:12,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:12,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:12,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:13:12,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757008109] [2020-10-12 10:13:12,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:12,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:13:12,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327581373] [2020-10-12 10:13:12,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:13:12,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:13:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:13:12,419 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 20 states. [2020-10-12 10:13:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:13,705 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2020-10-12 10:13:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:13:13,707 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 10:13:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:13,708 INFO L225 Difference]: With dead ends: 138 [2020-10-12 10:13:13,709 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 10:13:13,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:13:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 10:13:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2020-10-12 10:13:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:13:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-12 10:13:13,729 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-10-12 10:13:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:13,730 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-12 10:13:13,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:13:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-12 10:13:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:13:13,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:13,731 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:13,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:13:13,731 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1095921955, now seen corresponding path program 12 times [2020-10-12 10:13:13,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:13,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396333261] [2020-10-12 10:13:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:13,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:13:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 10:13:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:13:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:19,148 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-12 10:13:19,562 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-12 10:13:19,985 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 10:13:20,276 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 10:13:20,550 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:13:20,851 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:13:21,124 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 10:13:21,277 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-12 10:13:21,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:21,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:21,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:21,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:21,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:21,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:21,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:21,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:21,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:21,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:21,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:21,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:21,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:21,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:21,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:21,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:21,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:13:21,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396333261] [2020-10-12 10:13:21,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:21,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:13:21,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638133390] [2020-10-12 10:13:21,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:13:21,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:13:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:13:21,929 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 25 states. [2020-10-12 10:13:23,266 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 119 [2020-10-12 10:13:23,601 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-12 10:13:23,929 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 10:13:24,720 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-12 10:13:27,169 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-12 10:13:27,689 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 105 [2020-10-12 10:13:28,180 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-12 10:13:29,041 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 10:13:29,678 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-12 10:13:30,539 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 124 [2020-10-12 10:13:31,355 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2020-10-12 10:13:32,240 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2020-10-12 10:13:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:32,373 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2020-10-12 10:13:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:13:32,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2020-10-12 10:13:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:32,375 INFO L225 Difference]: With dead ends: 106 [2020-10-12 10:13:32,375 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:13:32,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:13:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:13:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-10-12 10:13:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:13:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-12 10:13:32,390 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 47 [2020-10-12 10:13:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:32,390 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-12 10:13:32,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:13:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-12 10:13:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:13:32,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:32,391 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:32,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:13:32,391 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash 547606889, now seen corresponding path program 13 times [2020-10-12 10:13:32,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:32,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480173768] [2020-10-12 10:13:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:32,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:37,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:13:37,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:13:37,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:13:37,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:37,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:13:37,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:37,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:13:37,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:37,711 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-12 10:13:37,839 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-12 10:13:38,001 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-12 10:13:38,153 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 10:13:38,295 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-12 10:13:38,568 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-12 10:13:39,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:39,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:39,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:39,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:39,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:39,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:13:39,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480173768] [2020-10-12 10:13:39,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:39,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:13:39,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323240050] [2020-10-12 10:13:39,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:13:39,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:13:39,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:13:39,939 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 28 states. [2020-10-12 10:13:40,815 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:13:41,045 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-12 10:13:41,509 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2020-10-12 10:13:41,937 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-12 10:13:42,339 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-12 10:13:42,642 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-12 10:13:43,004 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-12 10:13:43,367 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-12 10:13:43,641 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-12 10:13:43,909 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 10:13:44,325 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-12 10:13:44,548 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-12 10:13:44,911 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-12 10:13:45,379 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 10:13:46,029 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2020-10-12 10:13:46,478 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-12 10:13:46,981 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-12 10:13:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:47,266 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-12 10:13:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:13:47,269 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2020-10-12 10:13:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:47,271 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:13:47,271 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:13:47,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:13:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:13:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-10-12 10:13:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:13:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-10-12 10:13:47,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 49 [2020-10-12 10:13:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:47,298 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-10-12 10:13:47,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:13:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-10-12 10:13:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:13:47,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:47,299 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:47,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:13:47,300 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 14 times [2020-10-12 10:13:47,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:47,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820312219] [2020-10-12 10:13:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:47,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:13:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:13:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:13:52,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:52,797 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:13:53,126 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 44 [2020-10-12 10:13:53,404 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 29 [2020-10-12 10:13:53,740 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 30 [2020-10-12 10:13:54,176 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 46 [2020-10-12 10:13:54,593 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 46 [2020-10-12 10:13:55,034 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 47 [2020-10-12 10:13:55,502 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 50 [2020-10-12 10:13:55,890 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 55 [2020-10-12 10:13:56,155 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-12 10:13:57,652 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 176 DAG size of output: 117 [2020-10-12 10:13:58,992 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 175 DAG size of output: 114 [2020-10-12 10:13:59,814 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 104 [2020-10-12 10:14:01,137 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 155 DAG size of output: 100 [2020-10-12 10:14:01,759 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-12 10:14:02,332 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 64 [2020-10-12 10:14:02,658 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-12 10:14:02,994 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-12 10:14:03,275 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-10-12 10:14:03,608 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-12 10:14:03,848 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-10-12 10:14:04,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:04,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:04,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:04,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:04,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:04,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:04,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:04,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:04,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820312219] [2020-10-12 10:14:04,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:04,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:14:04,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428513892] [2020-10-12 10:14:04,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:14:04,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:14:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:14:04,779 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 31 states. [2020-10-12 10:14:05,833 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 111 [2020-10-12 10:14:06,522 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 121 [2020-10-12 10:14:06,952 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 10:14:07,751 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 117 [2020-10-12 10:14:14,990 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 442 DAG size of output: 414 [2020-10-12 10:14:15,942 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 142 [2020-10-12 10:14:16,917 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 150 [2020-10-12 10:14:18,422 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-12 10:14:19,931 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 196 DAG size of output: 195 [2020-10-12 10:14:21,452 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 202 DAG size of output: 201 [2020-10-12 10:14:23,193 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 210 DAG size of output: 199 [2020-10-12 10:14:23,899 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 10:14:24,372 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 10:14:25,330 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2020-10-12 10:14:26,224 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 10:14:26,772 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-12 10:14:27,310 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-12 10:14:32,781 WARN L193 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 342 DAG size of output: 329 [2020-10-12 10:14:38,136 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 344 DAG size of output: 331 [2020-10-12 10:14:43,568 WARN L193 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 339 DAG size of output: 326 [2020-10-12 10:14:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:43,907 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2020-10-12 10:14:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:14:43,909 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-10-12 10:14:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:43,911 INFO L225 Difference]: With dead ends: 111 [2020-10-12 10:14:43,911 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 10:14:43,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:14:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 10:14:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2020-10-12 10:14:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:14:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-12 10:14:43,939 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 49 [2020-10-12 10:14:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:43,940 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-12 10:14:43,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:14:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-12 10:14:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:14:43,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:43,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:43,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:14:43,941 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -489362965, now seen corresponding path program 15 times [2020-10-12 10:14:43,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:43,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241112494] [2020-10-12 10:14:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:44,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:44,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:46,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:48,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:48,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:14:48,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:14:48,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:14:48,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:14:48,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:48,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:14:48,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:49,382 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-10-12 10:14:49,611 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-10-12 10:14:49,884 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2020-10-12 10:14:50,105 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 10:14:50,458 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-12 10:14:50,642 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 10:14:51,019 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 10:14:51,199 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-12 10:14:51,657 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-12 10:14:51,884 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-12 10:14:53,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:53,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:53,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:53,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:53,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:53,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:53,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:53,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:14:53,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241112494] [2020-10-12 10:14:53,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:53,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:14:53,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592095280] [2020-10-12 10:14:53,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:14:53,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:14:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:14:53,198 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 29 states. [2020-10-12 10:14:55,026 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 10:14:55,443 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-12 10:14:55,770 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-12 10:14:56,450 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-12 10:14:57,564 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-12 10:14:57,906 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 10:14:58,249 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 10:14:58,605 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-12 10:14:59,045 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:14:59,567 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:14:59,903 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-12 10:15:00,373 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-12 10:15:01,187 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-12 10:15:02,026 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-12 10:15:02,629 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-12 10:15:03,387 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 10:15:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:03,507 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-10-12 10:15:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:15:03,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 51 [2020-10-12 10:15:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:03,511 INFO L225 Difference]: With dead ends: 127 [2020-10-12 10:15:03,511 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 10:15:03,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=297, Invalid=3009, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:15:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 10:15:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 80. [2020-10-12 10:15:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:15:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-12 10:15:03,539 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 51 [2020-10-12 10:15:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:03,540 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-12 10:15:03,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:15:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-12 10:15:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:15:03,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:03,541 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:03,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:15:03,541 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1956717823, now seen corresponding path program 16 times [2020-10-12 10:15:03,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:03,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412162314] [2020-10-12 10:15:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:08,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:08,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:15:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:09,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:10,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:10,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:10,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:10,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:10,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:10,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:15:10,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412162314] [2020-10-12 10:15:10,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:10,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:15:10,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858663449] [2020-10-12 10:15:10,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:15:10,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:15:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:15:10,016 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 23 states. [2020-10-12 10:15:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:11,957 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2020-10-12 10:15:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:15:11,959 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-12 10:15:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:11,961 INFO L225 Difference]: With dead ends: 158 [2020-10-12 10:15:11,961 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 10:15:11,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:15:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 10:15:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2020-10-12 10:15:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:15:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2020-10-12 10:15:11,986 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 52 [2020-10-12 10:15:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:11,987 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2020-10-12 10:15:11,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:15:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2020-10-12 10:15:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:15:11,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:11,987 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:15:11,988 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash -584979987, now seen corresponding path program 17 times [2020-10-12 10:15:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:11,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073047189] [2020-10-12 10:15:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:12,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:13,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:17,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:17,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:15:17,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:15:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-12 10:15:17,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:15:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:15:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:17,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 11 [2020-10-12 10:15:17,578 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 20 [2020-10-12 10:15:17,883 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-12 10:15:18,075 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-10-12 10:15:18,244 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-12 10:15:18,439 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:15:18,757 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 10:15:18,960 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-12 10:15:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:20,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:20,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:20,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:20,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 5 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:15:20,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073047189] [2020-10-12 10:15:20,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:20,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:15:20,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744865207] [2020-10-12 10:15:20,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:15:20,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:15:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:15:20,699 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 30 states. [2020-10-12 10:15:22,783 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-12 10:15:23,240 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 10:15:23,523 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 10:15:24,244 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-12 10:15:24,996 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-12 10:15:25,846 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-12 10:15:26,262 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59