/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:09:03,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:09:03,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:09:03,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:09:03,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:09:03,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:09:03,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:09:03,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:09:03,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:09:03,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:09:03,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:09:03,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:09:03,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:09:03,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:09:03,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:09:03,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:09:03,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:09:03,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:09:03,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:09:03,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:09:03,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:09:03,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:09:03,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:09:03,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:09:03,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:09:03,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:09:03,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:09:03,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:09:03,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:09:03,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:09:03,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:09:03,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:09:03,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:09:03,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:09:03,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:09:03,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:09:03,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:09:03,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:09:03,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:09:03,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:09:03,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:09:03,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:09:03,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:09:03,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:09:03,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:09:03,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:09:03,414 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:09:03,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:09:03,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:09:03,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:09:03,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:09:03,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:09:03,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:09:03,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:09:03,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:09:03,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:09:03,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:09:03,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:09:03,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:09:03,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:09:03,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:09:03,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:09:03,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:09:03,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:09:03,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:09:03,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:09:03,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:09:03,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:09:03,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:09:03,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:09:03,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:09:03,777 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:09:03,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2020-10-15 00:09:03,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec9ef252/423504cf5aa548eab209656dcbb42652/FLAG8a9af0676 [2020-10-15 00:09:04,282 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:09:04,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/insertion_sort-1.c [2020-10-15 00:09:04,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec9ef252/423504cf5aa548eab209656dcbb42652/FLAG8a9af0676 [2020-10-15 00:09:04,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec9ef252/423504cf5aa548eab209656dcbb42652 [2020-10-15 00:09:04,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:09:04,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:09:04,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:04,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:09:04,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:09:04,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:04,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144c4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04, skipping insertion in model container [2020-10-15 00:09:04,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:04,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:09:04,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:09:04,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:04,910 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:09:04,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:04,946 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:09:04,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04 WrapperNode [2020-10-15 00:09:04,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:04,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:09:04,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:09:04,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:09:05,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... [2020-10-15 00:09:05,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:09:05,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:09:05,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:09:05,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:09:05,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:09:05,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:09:05,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:09:05,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:09:05,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:09:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:09:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:09:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-15 00:09:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:09:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:09:05,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:09:05,401 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-15 00:09:05,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:05 BoogieIcfgContainer [2020-10-15 00:09:05,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:09:05,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:09:05,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:09:05,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:09:05,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:04" (1/3) ... [2020-10-15 00:09:05,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ea414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:05, skipping insertion in model container [2020-10-15 00:09:05,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:04" (2/3) ... [2020-10-15 00:09:05,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ea414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:05, skipping insertion in model container [2020-10-15 00:09:05,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:05" (3/3) ... [2020-10-15 00:09:05,414 INFO L109 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2020-10-15 00:09:05,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:09:05,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:09:05,449 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:09:05,482 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:09:05,482 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:09:05,482 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:09:05,482 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:09:05,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:09:05,483 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:09:05,484 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:09:05,484 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:09:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-15 00:09:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:09:05,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:05,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:05,526 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:05,531 INFO L82 PathProgramCache]: Analyzing trace with hash 342854797, now seen corresponding path program 1 times [2020-10-15 00:09:05,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:05,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393756712] [2020-10-15 00:09:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:05,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:06,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:06,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:09:06,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:06,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-15 00:09:06,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:06,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:06,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:06,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:06,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:09:06,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:09:06,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:06,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:06,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:06,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:06,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:06,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:06,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:06,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:06,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:06,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:06,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:09:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:06,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393756712] [2020-10-15 00:09:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:06,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 00:09:06,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054740541] [2020-10-15 00:09:06,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:06,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:06,239 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-10-15 00:09:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:06,478 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-10-15 00:09:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:09:06,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-15 00:09:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:06,489 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:09:06,490 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:09:06,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:09:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-10-15 00:09:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:09:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-15 00:09:06,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-10-15 00:09:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:06,534 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-15 00:09:06,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-15 00:09:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:09:06,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:06,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:06,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:09:06,536 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1336061280, now seen corresponding path program 1 times [2020-10-15 00:09:06,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:06,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970178472] [2020-10-15 00:09:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:07,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:09:07,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:07,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-15 00:09:07,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:07,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:07,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:09:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:09:07,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:07,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:07,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:07,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:07,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:07,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970178472] [2020-10-15 00:09:07,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:07,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:09:07,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817333111] [2020-10-15 00:09:07,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:09:07,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:09:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:09:07,517 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 12 states. [2020-10-15 00:09:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:08,142 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2020-10-15 00:09:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:09:08,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-15 00:09:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:08,146 INFO L225 Difference]: With dead ends: 86 [2020-10-15 00:09:08,147 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 00:09:08,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:09:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 00:09:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-10-15 00:09:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:09:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-15 00:09:08,168 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2020-10-15 00:09:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:08,168 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-15 00:09:08,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:09:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-15 00:09:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:09:08,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:08,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:08,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:09:08,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1156917258, now seen corresponding path program 1 times [2020-10-15 00:09:08,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:08,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245535184] [2020-10-15 00:09:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:08,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:08,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:08,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:08,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:09,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:09,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:09,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:09:09,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:09:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1487 [2020-10-15 00:09:09,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:09,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:09,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:09,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:09,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:09,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:09,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:09,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:09,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:09,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245535184] [2020-10-15 00:09:09,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:09,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:09,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603100207] [2020-10-15 00:09:09,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:09,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:09,946 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 14 states. [2020-10-15 00:09:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:11,373 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2020-10-15 00:09:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:09:11,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-15 00:09:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:11,377 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:09:11,377 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:09:11,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:09:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:09:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2020-10-15 00:09:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:09:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-15 00:09:11,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 24 [2020-10-15 00:09:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:11,391 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-15 00:09:11,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-15 00:09:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:09:11,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:11,392 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:11,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:09:11,393 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash -455852680, now seen corresponding path program 1 times [2020-10-15 00:09:11,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:11,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628764854] [2020-10-15 00:09:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:12,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:12,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:09:12,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:09:12,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-15 00:09:12,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:12,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:12,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:09:12,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:12,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:12,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:12,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:12,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:12,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:12,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:12,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:12,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628764854] [2020-10-15 00:09:12,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:12,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:12,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097326411] [2020-10-15 00:09:12,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:12,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:12,968 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 14 states. [2020-10-15 00:09:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:13,743 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2020-10-15 00:09:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:09:13,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-15 00:09:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:13,746 INFO L225 Difference]: With dead ends: 125 [2020-10-15 00:09:13,747 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 00:09:13,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:09:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 00:09:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2020-10-15 00:09:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 00:09:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-15 00:09:13,757 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 24 [2020-10-15 00:09:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:13,758 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-15 00:09:13,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-15 00:09:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:09:13,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:13,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:13,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:09:13,759 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2042668019, now seen corresponding path program 2 times [2020-10-15 00:09:13,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:13,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269706984] [2020-10-15 00:09:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:14,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:14,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:09:14,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:14,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-15 00:09:14,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:14,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:14,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:09:14,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:14,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:14,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:14,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:14,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:14,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:14,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:14,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:14,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:14,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:14,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:14,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269706984] [2020-10-15 00:09:14,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:14,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:09:14,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009509291] [2020-10-15 00:09:14,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:09:14,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:09:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:09:14,614 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 13 states. [2020-10-15 00:09:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:15,415 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2020-10-15 00:09:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:09:15,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-15 00:09:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:15,417 INFO L225 Difference]: With dead ends: 100 [2020-10-15 00:09:15,417 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 00:09:15,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:09:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 00:09:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 51. [2020-10-15 00:09:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:09:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-15 00:09:15,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 25 [2020-10-15 00:09:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:15,428 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-15 00:09:15,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:09:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-15 00:09:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:09:15,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:15,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:15,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:09:15,430 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2145817879, now seen corresponding path program 1 times [2020-10-15 00:09:15,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:15,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830751706] [2020-10-15 00:09:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:15,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:15,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:15,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-15 00:09:15,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:15,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:15,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:15,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:15,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:15,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:15,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:15,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:15,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:15,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:15,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:15,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:15,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:09:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:15,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:15,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:15,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:15,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:15,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:15,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:15,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:15,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:15,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:15,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830751706] [2020-10-15 00:09:15,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:15,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:09:15,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365059825] [2020-10-15 00:09:15,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:09:15,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:09:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:15,703 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 8 states. [2020-10-15 00:09:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:15,863 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2020-10-15 00:09:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:09:15,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-15 00:09:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:15,865 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:09:15,866 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 00:09:15,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 00:09:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-10-15 00:09:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:09:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-15 00:09:15,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 27 [2020-10-15 00:09:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:15,895 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-15 00:09:15,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:09:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-15 00:09:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:09:15,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:15,899 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] [2020-10-15 00:09:15,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:09:15,900 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash -601629920, now seen corresponding path program 2 times [2020-10-15 00:09:15,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:15,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198476500] [2020-10-15 00:09:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:19,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:20,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:20,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:09:20,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4939 [2020-10-15 00:09:20,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:20,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:09:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:09:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:20,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:21,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:21,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:21,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:21,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:21,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:21,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:21,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198476500] [2020-10-15 00:09:21,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:21,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:09:21,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656783313] [2020-10-15 00:09:21,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:09:21,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:09:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:09:21,153 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 15 states. [2020-10-15 00:09:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:22,030 INFO L93 Difference]: Finished difference Result 175 states and 227 transitions. [2020-10-15 00:09:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:09:22,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-15 00:09:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:22,033 INFO L225 Difference]: With dead ends: 175 [2020-10-15 00:09:22,035 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 00:09:22,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:09:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 00:09:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 86. [2020-10-15 00:09:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:09:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-15 00:09:22,074 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 29 [2020-10-15 00:09:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:22,075 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-15 00:09:22,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:09:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-15 00:09:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:09:22,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:22,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:22,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:09:22,080 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1622698274, now seen corresponding path program 2 times [2020-10-15 00:09:22,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:22,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252610916] [2020-10-15 00:09:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:23,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:24,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:25,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:25,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:25,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:09:25,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3620 [2020-10-15 00:09:25,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:25,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:09:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:09:25,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:25,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:26,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:26,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:26,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:26,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:26,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:26,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:26,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:26,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252610916] [2020-10-15 00:09:26,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:26,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:09:26,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312675507] [2020-10-15 00:09:26,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:09:26,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:09:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:09:26,086 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 16 states. [2020-10-15 00:09:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:27,140 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2020-10-15 00:09:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:09:27,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-15 00:09:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:27,142 INFO L225 Difference]: With dead ends: 150 [2020-10-15 00:09:27,142 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 00:09:27,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:09:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 00:09:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2020-10-15 00:09:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:09:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2020-10-15 00:09:27,161 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 29 [2020-10-15 00:09:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:27,161 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2020-10-15 00:09:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:09:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2020-10-15 00:09:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:09:27,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:27,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:27,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:09:27,167 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash -921633696, now seen corresponding path program 3 times [2020-10-15 00:09:27,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:27,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968717273] [2020-10-15 00:09:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:28,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:28,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:28,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:09:28,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-15 00:09:28,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:28,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:09:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:28,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:09:28,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:28,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:28,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:28,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:28,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:28,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:28,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:28,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:28,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968717273] [2020-10-15 00:09:28,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:28,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:09:28,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024828209] [2020-10-15 00:09:28,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:09:28,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:09:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:09:28,970 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 18 states. [2020-10-15 00:09:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:30,937 INFO L93 Difference]: Finished difference Result 209 states and 259 transitions. [2020-10-15 00:09:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:09:30,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-15 00:09:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:30,939 INFO L225 Difference]: With dead ends: 209 [2020-10-15 00:09:30,939 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 00:09:30,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:09:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 00:09:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-10-15 00:09:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 00:09:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-15 00:09:30,963 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 29 [2020-10-15 00:09:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:30,964 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-15 00:09:30,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:09:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-15 00:09:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:09:30,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:30,968 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:30,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:09:30,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1205365445, now seen corresponding path program 4 times [2020-10-15 00:09:30,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:30,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944136521] [2020-10-15 00:09:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:35,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:35,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:35,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:09:35,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:09:35,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:09:35,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:35,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:09:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:09:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:36,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:36,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:36,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:36,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:36,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:36,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944136521] [2020-10-15 00:09:36,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:36,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:09:36,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083805290] [2020-10-15 00:09:36,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:09:36,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:36,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:09:36,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:09:36,488 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-10-15 00:09:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:38,826 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2020-10-15 00:09:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:09:38,827 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-10-15 00:09:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:38,829 INFO L225 Difference]: With dead ends: 139 [2020-10-15 00:09:38,829 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 00:09:38,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=415, Invalid=2237, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:09:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 00:09:38,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 83. [2020-10-15 00:09:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:09:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-10-15 00:09:38,845 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 30 [2020-10-15 00:09:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:38,845 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-10-15 00:09:38,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:09:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-10-15 00:09:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:09:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:38,847 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:09:38,847 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash 194248195, now seen corresponding path program 1 times [2020-10-15 00:09:38,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496745379] [2020-10-15 00:09:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:41,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:09:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:09:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3022 [2020-10-15 00:09:41,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:41,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:09:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:09:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:42,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:42,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:42,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:42,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:42,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:42,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:42,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:42,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496745379] [2020-10-15 00:09:42,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:42,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:42,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803082235] [2020-10-15 00:09:42,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:42,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:42,066 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 14 states. [2020-10-15 00:09:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:42,663 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-10-15 00:09:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:09:42,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-15 00:09:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:42,667 INFO L225 Difference]: With dead ends: 160 [2020-10-15 00:09:42,667 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 00:09:42,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:09:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 00:09:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 110. [2020-10-15 00:09:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 00:09:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2020-10-15 00:09:42,682 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 30 [2020-10-15 00:09:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:42,682 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2020-10-15 00:09:42,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2020-10-15 00:09:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:09:42,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:42,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:42,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:09:42,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 586827946, now seen corresponding path program 2 times [2020-10-15 00:09:42,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:42,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611090852] [2020-10-15 00:09:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:42,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:42,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:42,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:09:42,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:42,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-15 00:09:42,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:42,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:09:42,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:43,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:43,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:43,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:43,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:09:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-15 00:09:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:43,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:43,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:43,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611090852] [2020-10-15 00:09:43,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:43,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:43,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871449324] [2020-10-15 00:09:43,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:43,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:43,185 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand 14 states. [2020-10-15 00:09:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:43,765 INFO L93 Difference]: Finished difference Result 233 states and 305 transitions. [2020-10-15 00:09:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:09:43,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-15 00:09:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:43,768 INFO L225 Difference]: With dead ends: 233 [2020-10-15 00:09:43,768 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 00:09:43,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:09:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 00:09:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2020-10-15 00:09:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 00:09:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2020-10-15 00:09:43,779 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 33 [2020-10-15 00:09:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:43,780 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2020-10-15 00:09:43,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2020-10-15 00:09:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:09:43,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:43,782 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:43,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:09:43,782 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:43,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2101493136, now seen corresponding path program 2 times [2020-10-15 00:09:43,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:43,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080665272] [2020-10-15 00:09:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:09:48,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:09:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:48,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:48,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080665272] [2020-10-15 00:09:48,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:48,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:09:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683420464] [2020-10-15 00:09:48,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:09:48,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:09:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:48,860 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 9 states. [2020-10-15 00:09:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:49,157 INFO L93 Difference]: Finished difference Result 191 states and 236 transitions. [2020-10-15 00:09:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:09:49,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-15 00:09:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:49,159 INFO L225 Difference]: With dead ends: 191 [2020-10-15 00:09:49,160 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 00:09:49,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:09:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 00:09:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2020-10-15 00:09:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:09:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-10-15 00:09:49,183 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 36 [2020-10-15 00:09:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:49,184 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-10-15 00:09:49,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:09:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-10-15 00:09:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:09:49,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:49,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:49,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:09:49,188 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash -591767046, now seen corresponding path program 1 times [2020-10-15 00:09:49,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:49,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158096816] [2020-10-15 00:09:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:54,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:09:54,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:09:54,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:09:54,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:54,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:54,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:09:54,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:54,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:09:54,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:54,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:54,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:54,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:54,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:54,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-15 00:09:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:54,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:54,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:09:54,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:54,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:54,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:54,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158096816] [2020-10-15 00:09:54,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:54,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:09:54,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306752651] [2020-10-15 00:09:54,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:09:54,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:09:54,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:09:54,573 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 16 states. [2020-10-15 00:09:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:55,909 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2020-10-15 00:09:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:09:55,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-15 00:09:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:55,912 INFO L225 Difference]: With dead ends: 148 [2020-10-15 00:09:55,912 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 00:09:55,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:09:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 00:09:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2020-10-15 00:09:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 00:09:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-10-15 00:09:55,929 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 38 [2020-10-15 00:09:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:55,929 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-10-15 00:09:55,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:09:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-10-15 00:09:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:09:55,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:55,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:55,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:09:55,931 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1198506493, now seen corresponding path program 3 times [2020-10-15 00:09:55,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:55,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253161832] [2020-10-15 00:09:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:56,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:56,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:56,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:56,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:09:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:56,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:56,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:56,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253161832] [2020-10-15 00:09:56,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:56,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:09:56,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079531827] [2020-10-15 00:09:56,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:09:56,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:09:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:09:56,490 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 15 states. [2020-10-15 00:09:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:57,368 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2020-10-15 00:09:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:09:57,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-15 00:09:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:57,372 INFO L225 Difference]: With dead ends: 169 [2020-10-15 00:09:57,372 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 00:09:57,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:09:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 00:09:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 101. [2020-10-15 00:09:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:09:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-10-15 00:09:57,394 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 39 [2020-10-15 00:09:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:57,394 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-10-15 00:09:57,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:09:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-10-15 00:09:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:09:57,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:57,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:57,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:09:57,396 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1463502433, now seen corresponding path program 4 times [2020-10-15 00:09:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:57,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317960672] [2020-10-15 00:09:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:09:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:57,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-15 00:09:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:57,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:57,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:57,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-15 00:09:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:57,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:57,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:57,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:09:57,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317960672] [2020-10-15 00:09:57,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:57,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:09:57,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106417462] [2020-10-15 00:09:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:09:57,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:09:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:09:57,690 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 10 states. [2020-10-15 00:09:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:58,057 INFO L93 Difference]: Finished difference Result 196 states and 243 transitions. [2020-10-15 00:09:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:09:58,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-15 00:09:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:58,060 INFO L225 Difference]: With dead ends: 196 [2020-10-15 00:09:58,060 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 00:09:58,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:09:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 00:09:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2020-10-15 00:09:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 00:09:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-15 00:09:58,078 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 41 [2020-10-15 00:09:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:58,078 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-15 00:09:58,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:09:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-15 00:09:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:09:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:58,079 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:58,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:09:58,080 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1630887468, now seen corresponding path program 1 times [2020-10-15 00:09:58,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:58,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648431460] [2020-10-15 00:09:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:58,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:10:03,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:10:03,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:03,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:03,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:10:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:03,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:03,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:03,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:03,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:03,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648431460] [2020-10-15 00:10:03,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:03,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:10:03,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722278262] [2020-10-15 00:10:03,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:10:03,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:10:03,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:10:03,673 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 20 states. [2020-10-15 00:10:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:05,468 INFO L93 Difference]: Finished difference Result 341 states and 417 transitions. [2020-10-15 00:10:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:10:05,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-15 00:10:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:05,472 INFO L225 Difference]: With dead ends: 341 [2020-10-15 00:10:05,472 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 00:10:05,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:10:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 00:10:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2020-10-15 00:10:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 00:10:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2020-10-15 00:10:05,490 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 43 [2020-10-15 00:10:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:05,491 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2020-10-15 00:10:05,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:10:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2020-10-15 00:10:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:10:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:05,492 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:05,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:10:05,492 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1316368837, now seen corresponding path program 1 times [2020-10-15 00:10:05,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:05,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239096588] [2020-10-15 00:10:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:05,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:05,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:05,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:06,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1601 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:07,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:10:07,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:07,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-15 00:10:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:07,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239096588] [2020-10-15 00:10:07,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:07,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:07,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086159867] [2020-10-15 00:10:07,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:07,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:07,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:07,340 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 16 states. [2020-10-15 00:10:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:08,663 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2020-10-15 00:10:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:10:08,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-15 00:10:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:08,667 INFO L225 Difference]: With dead ends: 356 [2020-10-15 00:10:08,667 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 00:10:08,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:10:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 00:10:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 173. [2020-10-15 00:10:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-15 00:10:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2020-10-15 00:10:08,688 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 44 [2020-10-15 00:10:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:08,688 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2020-10-15 00:10:08,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2020-10-15 00:10:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:10:08,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:08,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:08,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:10:08,690 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1588085580, now seen corresponding path program 5 times [2020-10-15 00:10:08,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:08,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285058024] [2020-10-15 00:10:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:10:08,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:09,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:09,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:09,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:09,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:09,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:09,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:09,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:10:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:09,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:09,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:09,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:09,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-15 00:10:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:09,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:09,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:09,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:10:09,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285058024] [2020-10-15 00:10:09,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:09,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:09,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565468774] [2020-10-15 00:10:09,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:09,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:09,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:09,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:09,185 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand 16 states. [2020-10-15 00:10:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:10,058 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2020-10-15 00:10:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:10:10,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-15 00:10:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:10,061 INFO L225 Difference]: With dead ends: 262 [2020-10-15 00:10:10,061 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 00:10:10,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:10:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 00:10:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-10-15 00:10:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-15 00:10:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 245 transitions. [2020-10-15 00:10:10,081 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 245 transitions. Word has length 47 [2020-10-15 00:10:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:10,082 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 245 transitions. [2020-10-15 00:10:10,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 245 transitions. [2020-10-15 00:10:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:10:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:10,083 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:10,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:10:10,083 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1972152002, now seen corresponding path program 2 times [2020-10-15 00:10:10,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:10,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319659865] [2020-10-15 00:10:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:10,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:15,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:10:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:16,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:16,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:16,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:16,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:16,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:16,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:10:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:16,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:16,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:16,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:16,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:16,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:16,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:10:16,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:10:16,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:16,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:16,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319659865] [2020-10-15 00:10:16,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:16,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:10:16,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881816788] [2020-10-15 00:10:16,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:10:16,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:10:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:10:16,153 INFO L87 Difference]: Start difference. First operand 204 states and 245 transitions. Second operand 23 states. [2020-10-15 00:10:16,772 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-15 00:10:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:18,439 INFO L93 Difference]: Finished difference Result 311 states and 373 transitions. [2020-10-15 00:10:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:10:18,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-10-15 00:10:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:18,442 INFO L225 Difference]: With dead ends: 311 [2020-10-15 00:10:18,443 INFO L226 Difference]: Without dead ends: 298 [2020-10-15 00:10:18,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:10:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-15 00:10:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 205. [2020-10-15 00:10:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-15 00:10:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2020-10-15 00:10:18,467 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 48 [2020-10-15 00:10:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:18,467 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2020-10-15 00:10:18,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:10:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2020-10-15 00:10:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:10:18,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:18,468 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:18,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:10:18,469 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1128146500, now seen corresponding path program 3 times [2020-10-15 00:10:18,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:18,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444337751] [2020-10-15 00:10:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:23,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:10:23,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-15 00:10:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-15 00:10:23,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:23,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:10:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:10:23,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:24,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:24,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:10:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:24,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:24,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444337751] [2020-10-15 00:10:24,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:24,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:10:24,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573024712] [2020-10-15 00:10:24,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:10:24,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:10:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:10:24,138 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 22 states. [2020-10-15 00:10:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:26,541 INFO L93 Difference]: Finished difference Result 334 states and 399 transitions. [2020-10-15 00:10:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:10:26,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-15 00:10:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:26,544 INFO L225 Difference]: With dead ends: 334 [2020-10-15 00:10:26,545 INFO L226 Difference]: Without dead ends: 321 [2020-10-15 00:10:26,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:10:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-15 00:10:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 204. [2020-10-15 00:10:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-15 00:10:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 245 transitions. [2020-10-15 00:10:26,577 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 245 transitions. Word has length 48 [2020-10-15 00:10:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:26,577 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 245 transitions. [2020-10-15 00:10:26,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:10:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 245 transitions. [2020-10-15 00:10:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:10:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:26,578 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:26,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:10:26,579 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1834674623, now seen corresponding path program 1 times [2020-10-15 00:10:26,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:26,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565231874] [2020-10-15 00:10:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:10:31,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 00:10:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:10:31,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:31,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:31,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:31,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:31,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-15 00:10:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:31,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:31,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:31,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:31,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565231874] [2020-10-15 00:10:31,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:31,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:10:31,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123454252] [2020-10-15 00:10:31,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:10:31,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:10:31,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:10:31,856 INFO L87 Difference]: Start difference. First operand 204 states and 245 transitions. Second operand 18 states. [2020-10-15 00:10:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:34,200 INFO L93 Difference]: Finished difference Result 322 states and 391 transitions. [2020-10-15 00:10:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:10:34,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-15 00:10:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:34,205 INFO L225 Difference]: With dead ends: 322 [2020-10-15 00:10:34,205 INFO L226 Difference]: Without dead ends: 320 [2020-10-15 00:10:34,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:10:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-15 00:10:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 213. [2020-10-15 00:10:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-15 00:10:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 257 transitions. [2020-10-15 00:10:34,245 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 257 transitions. Word has length 49 [2020-10-15 00:10:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:34,245 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 257 transitions. [2020-10-15 00:10:34,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:10:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 257 transitions. [2020-10-15 00:10:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:10:34,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:34,247 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:34,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:10:34,247 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1831939583, now seen corresponding path program 4 times [2020-10-15 00:10:34,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:34,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822369135] [2020-10-15 00:10:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:34,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:39,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:10:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:40,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:40,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-15 00:10:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:40,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:40,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:10:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822369135] [2020-10-15 00:10:40,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:40,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:10:40,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043265793] [2020-10-15 00:10:40,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:10:40,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:10:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:10:40,127 INFO L87 Difference]: Start difference. First operand 213 states and 257 transitions. Second operand 21 states. [2020-10-15 00:10:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:42,809 INFO L93 Difference]: Finished difference Result 388 states and 473 transitions. [2020-10-15 00:10:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:10:42,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-15 00:10:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:42,813 INFO L225 Difference]: With dead ends: 388 [2020-10-15 00:10:42,813 INFO L226 Difference]: Without dead ends: 386 [2020-10-15 00:10:42,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:10:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-15 00:10:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 229. [2020-10-15 00:10:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 00:10:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 276 transitions. [2020-10-15 00:10:42,850 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 276 transitions. Word has length 49 [2020-10-15 00:10:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:42,850 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 276 transitions. [2020-10-15 00:10:42,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:10:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 276 transitions. [2020-10-15 00:10:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:10:42,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:42,852 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:42,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:10:42,852 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1264339310, now seen corresponding path program 2 times [2020-10-15 00:10:42,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:42,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780374112] [2020-10-15 00:10:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:47,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:10:47,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:10:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:10:47,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:47,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:10:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:10:47,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:48,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:48,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:48,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:48,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:48,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:48,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:48,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:48,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:48,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-15 00:10:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 00:10:48,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:48,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:10:48,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780374112] [2020-10-15 00:10:48,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:48,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:10:48,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419611944] [2020-10-15 00:10:48,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:10:48,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:10:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:10:48,397 INFO L87 Difference]: Start difference. First operand 229 states and 276 transitions. Second operand 18 states. [2020-10-15 00:10:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:49,843 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2020-10-15 00:10:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:10:49,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-15 00:10:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:49,846 INFO L225 Difference]: With dead ends: 342 [2020-10-15 00:10:49,846 INFO L226 Difference]: Without dead ends: 340 [2020-10-15 00:10:49,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:10:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-15 00:10:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 292. [2020-10-15 00:10:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-15 00:10:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 358 transitions. [2020-10-15 00:10:49,885 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 358 transitions. Word has length 50 [2020-10-15 00:10:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:49,885 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 358 transitions. [2020-10-15 00:10:49,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:10:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 358 transitions. [2020-10-15 00:10:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:10:49,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:49,887 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:49,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:10:49,887 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1007295364, now seen corresponding path program 3 times [2020-10-15 00:10:49,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:49,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313660319] [2020-10-15 00:10:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:50,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:10:50,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:50,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-15 00:10:50,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:50,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:10:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:50,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:50,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:50,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:50,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:50,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:50,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:50,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:50,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-15 00:10:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:50,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:50,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:50,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:50,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:50,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:50,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:50,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-15 00:10:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:50,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:50,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:50,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:50,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:50,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:10:50,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313660319] [2020-10-15 00:10:50,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:50,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:50,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693165325] [2020-10-15 00:10:50,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:50,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:50,568 INFO L87 Difference]: Start difference. First operand 292 states and 358 transitions. Second operand 15 states. [2020-10-15 00:10:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:51,852 INFO L93 Difference]: Finished difference Result 374 states and 458 transitions. [2020-10-15 00:10:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:10:51,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-15 00:10:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:51,856 INFO L225 Difference]: With dead ends: 374 [2020-10-15 00:10:51,856 INFO L226 Difference]: Without dead ends: 372 [2020-10-15 00:10:51,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:10:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-15 00:10:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 295. [2020-10-15 00:10:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-15 00:10:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 362 transitions. [2020-10-15 00:10:51,908 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 362 transitions. Word has length 52 [2020-10-15 00:10:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:51,909 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 362 transitions. [2020-10-15 00:10:51,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 362 transitions. [2020-10-15 00:10:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:10:51,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:51,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:51,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:10:51,911 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:51,911 INFO L82 PathProgramCache]: Analyzing trace with hash 745072839, now seen corresponding path program 6 times [2020-10-15 00:10:51,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:51,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044147627] [2020-10-15 00:10:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:51,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:52,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:10:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:10:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:52,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:52,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:52,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:52,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-15 00:10:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:52,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:52,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:52,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:52,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:52,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:52,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:52,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:52,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:52,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-15 00:10:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:52,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:52,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:52,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:52,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:52,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:10:52,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044147627] [2020-10-15 00:10:52,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:52,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:10:52,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080917020] [2020-10-15 00:10:52,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:10:52,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:10:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:10:52,717 INFO L87 Difference]: Start difference. First operand 295 states and 362 transitions. Second operand 17 states. [2020-10-15 00:10:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:53,974 INFO L93 Difference]: Finished difference Result 410 states and 501 transitions. [2020-10-15 00:10:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:10:53,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-15 00:10:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:53,979 INFO L225 Difference]: With dead ends: 410 [2020-10-15 00:10:53,979 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 00:10:53,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:10:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 00:10:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 292. [2020-10-15 00:10:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-15 00:10:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 358 transitions. [2020-10-15 00:10:54,021 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 358 transitions. Word has length 53 [2020-10-15 00:10:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:54,021 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 358 transitions. [2020-10-15 00:10:54,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:10:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 358 transitions. [2020-10-15 00:10:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:10:54,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:54,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:54,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:10:54,024 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -175042453, now seen corresponding path program 7 times [2020-10-15 00:10:54,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:54,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728759547] [2020-10-15 00:10:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:54,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-15 00:10:54,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-15 00:10:54,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:54,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:10:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:10:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:54,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:54,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:54,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:54,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:54,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:54,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:54,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:10:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:54,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:54,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-15 00:10:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-15 00:10:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:54,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:54,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:10:54,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728759547] [2020-10-15 00:10:54,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:54,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:10:54,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454405473] [2020-10-15 00:10:54,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:10:54,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:54,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:10:54,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:10:54,597 INFO L87 Difference]: Start difference. First operand 292 states and 358 transitions. Second operand 12 states. [2020-10-15 00:10:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:55,303 INFO L93 Difference]: Finished difference Result 486 states and 602 transitions. [2020-10-15 00:10:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:10:55,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-15 00:10:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:55,307 INFO L225 Difference]: With dead ends: 486 [2020-10-15 00:10:55,307 INFO L226 Difference]: Without dead ends: 462 [2020-10-15 00:10:55,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:10:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-15 00:10:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 360. [2020-10-15 00:10:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-15 00:10:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 441 transitions. [2020-10-15 00:10:55,366 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 441 transitions. Word has length 55 [2020-10-15 00:10:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 441 transitions. [2020-10-15 00:10:55,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:10:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 441 transitions. [2020-10-15 00:10:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:10:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:55,368 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:55,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:10:55,369 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash 707447662, now seen corresponding path program 5 times [2020-10-15 00:10:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:55,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094288478] [2020-10-15 00:10:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:00,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:00,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:11:00,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:00,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:11:00,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:01,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:01,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:01,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:01,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:01,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:01,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:01,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-15 00:11:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:01,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:01,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:01,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094288478] [2020-10-15 00:11:01,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:01,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:11:01,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358057344] [2020-10-15 00:11:01,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:11:01,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:11:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:11:01,165 INFO L87 Difference]: Start difference. First operand 360 states and 441 transitions. Second operand 22 states. [2020-10-15 00:11:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:03,898 INFO L93 Difference]: Finished difference Result 609 states and 737 transitions. [2020-10-15 00:11:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:11:03,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-15 00:11:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:03,901 INFO L225 Difference]: With dead ends: 609 [2020-10-15 00:11:03,901 INFO L226 Difference]: Without dead ends: 468 [2020-10-15 00:11:03,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:11:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-15 00:11:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 391. [2020-10-15 00:11:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-15 00:11:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 472 transitions. [2020-10-15 00:11:03,961 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 472 transitions. Word has length 53 [2020-10-15 00:11:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:03,962 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 472 transitions. [2020-10-15 00:11:03,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:11:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 472 transitions. [2020-10-15 00:11:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:11:03,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:03,963 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:03,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:11:03,964 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1983848057, now seen corresponding path program 1 times [2020-10-15 00:11:03,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:03,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752924581] [2020-10-15 00:11:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:03,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:05,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:08,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:09,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:11:09,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-15 00:11:09,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-15 00:11:09,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:09,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:11:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:11:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:09,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:09,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:09,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:09,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:09,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:09,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:09,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-15 00:11:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:09,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752924581] [2020-10-15 00:11:09,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:09,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:11:09,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651426251] [2020-10-15 00:11:09,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:11:09,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:09,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:11:09,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:11:09,785 INFO L87 Difference]: Start difference. First operand 391 states and 472 transitions. Second operand 20 states. [2020-10-15 00:11:10,914 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-10-15 00:11:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:12,493 INFO L93 Difference]: Finished difference Result 598 states and 721 transitions. [2020-10-15 00:11:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:11:12,495 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-15 00:11:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:12,499 INFO L225 Difference]: With dead ends: 598 [2020-10-15 00:11:12,499 INFO L226 Difference]: Without dead ends: 596 [2020-10-15 00:11:12,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:11:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-10-15 00:11:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 479. [2020-10-15 00:11:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-15 00:11:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 579 transitions. [2020-10-15 00:11:12,581 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 579 transitions. Word has length 54 [2020-10-15 00:11:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:12,582 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 579 transitions. [2020-10-15 00:11:12,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:11:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 579 transitions. [2020-10-15 00:11:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:11:12,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:12,584 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:12,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:11:12,584 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1675177493, now seen corresponding path program 6 times [2020-10-15 00:11:12,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:12,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562732726] [2020-10-15 00:11:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:12,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:14,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:14,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:17,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:11:17,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-15 00:11:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:11:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:17,904 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-15 00:11:18,104 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-15 00:11:18,299 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-15 00:11:18,487 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-15 00:11:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:19,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-15 00:11:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:19,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-15 00:11:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:11:19,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562732726] [2020-10-15 00:11:19,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:19,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:11:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950118104] [2020-10-15 00:11:19,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:11:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:11:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:11:19,182 INFO L87 Difference]: Start difference. First operand 479 states and 579 transitions. Second operand 21 states. [2020-10-15 00:11:19,878 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-15 00:11:20,328 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-15 00:11:20,662 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-15 00:11:21,187 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-15 00:11:22,315 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-15 00:11:22,699 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-15 00:11:23,393 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-15 00:11:23,920 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-15 00:11:24,413 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-15 00:11:24,705 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-15 00:11:24,883 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-15 00:11:25,040 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-15 00:11:25,274 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-15 00:11:25,637 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-15 00:11:25,884 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-15 00:11:26,067 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-15 00:11:26,284 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-15 00:11:26,782 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-15 00:11:27,111 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 00:11:27,827 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-15 00:11:28,414 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-15 00:11:28,579 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-15 00:11:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:28,718 INFO L93 Difference]: Finished difference Result 901 states and 1082 transitions. [2020-10-15 00:11:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-15 00:11:28,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-15 00:11:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:28,723 INFO L225 Difference]: With dead ends: 901 [2020-10-15 00:11:28,723 INFO L226 Difference]: Without dead ends: 834 [2020-10-15 00:11:28,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1046, Invalid=6436, Unknown=0, NotChecked=0, Total=7482 [2020-10-15 00:11:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-10-15 00:11:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 515. [2020-10-15 00:11:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-15 00:11:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 625 transitions. [2020-10-15 00:11:28,803 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 625 transitions. Word has length 54 [2020-10-15 00:11:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:28,804 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 625 transitions. [2020-10-15 00:11:28,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:11:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 625 transitions. [2020-10-15 00:11:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:11:28,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:28,806 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:28,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:11:28,807 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2098824215, now seen corresponding path program 7 times [2020-10-15 00:11:28,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:28,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141874454] [2020-10-15 00:11:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:28,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:33,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:11:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:11:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:34,203 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 00:11:35,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:35,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:35,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:35,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:35,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-15 00:11:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:35,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:35,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:35,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:35,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:35,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141874454] [2020-10-15 00:11:35,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:35,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:11:35,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720423361] [2020-10-15 00:11:35,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:11:35,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:35,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:11:35,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:11:35,319 INFO L87 Difference]: Start difference. First operand 515 states and 625 transitions. Second operand 24 states. [2020-10-15 00:11:37,379 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-15 00:11:37,787 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-15 00:11:38,247 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-15 00:11:38,648 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-15 00:11:38,936 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-15 00:11:39,235 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-15 00:11:39,548 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-15 00:11:39,799 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-15 00:11:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:42,310 INFO L93 Difference]: Finished difference Result 668 states and 800 transitions. [2020-10-15 00:11:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:11:42,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-15 00:11:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:42,315 INFO L225 Difference]: With dead ends: 668 [2020-10-15 00:11:42,315 INFO L226 Difference]: Without dead ends: 659 [2020-10-15 00:11:42,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=425, Invalid=2881, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:11:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-15 00:11:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 571. [2020-10-15 00:11:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-10-15 00:11:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 689 transitions. [2020-10-15 00:11:42,412 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 689 transitions. Word has length 54 [2020-10-15 00:11:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:42,412 INFO L479 AbstractCegarLoop]: Abstraction has 571 states and 689 transitions. [2020-10-15 00:11:42,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:11:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 689 transitions. [2020-10-15 00:11:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:11:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:42,416 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:42,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:11:42,417 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -797020350, now seen corresponding path program 2 times [2020-10-15 00:11:42,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:42,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806127591] [2020-10-15 00:11:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:43,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:43,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:47,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:11:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:11:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:47,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:11:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:11:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:48,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:48,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-15 00:11:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:48,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:48,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:48,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:48,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:48,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:48,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:48,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806127591] [2020-10-15 00:11:48,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:48,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:11:48,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123497119] [2020-10-15 00:11:48,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:11:48,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:48,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:11:48,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:11:48,188 INFO L87 Difference]: Start difference. First operand 571 states and 689 transitions. Second operand 22 states. [2020-10-15 00:11:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:52,032 INFO L93 Difference]: Finished difference Result 733 states and 879 transitions. [2020-10-15 00:11:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:11:52,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-15 00:11:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:52,038 INFO L225 Difference]: With dead ends: 733 [2020-10-15 00:11:52,038 INFO L226 Difference]: Without dead ends: 731 [2020-10-15 00:11:52,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:11:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-10-15 00:11:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 557. [2020-10-15 00:11:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-10-15 00:11:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 675 transitions. [2020-10-15 00:11:52,143 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 675 transitions. Word has length 55 [2020-10-15 00:11:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:52,143 INFO L479 AbstractCegarLoop]: Abstraction has 557 states and 675 transitions. [2020-10-15 00:11:52,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:11:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 675 transitions. [2020-10-15 00:11:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:11:52,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:52,145 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:52,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:11:52,146 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -423894136, now seen corresponding path program 3 times [2020-10-15 00:11:52,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:52,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399377207] [2020-10-15 00:11:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:52,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:53,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:57,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:11:57,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 00:11:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:57,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:11:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:57,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:57,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:57,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:57,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:57,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:57,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:57,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:57,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-15 00:11:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:57,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:57,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:57,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:57,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:57,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 00:11:57,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399377207] [2020-10-15 00:11:57,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:57,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:11:57,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959730488] [2020-10-15 00:11:57,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:11:57,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:11:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:11:57,684 INFO L87 Difference]: Start difference. First operand 557 states and 675 transitions. Second operand 17 states. [2020-10-15 00:11:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:59,655 INFO L93 Difference]: Finished difference Result 659 states and 795 transitions. [2020-10-15 00:11:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:11:59,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-15 00:11:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:59,660 INFO L225 Difference]: With dead ends: 659 [2020-10-15 00:11:59,660 INFO L226 Difference]: Without dead ends: 657 [2020-10-15 00:11:59,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:11:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-15 00:11:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 581. [2020-10-15 00:11:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-15 00:11:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 706 transitions. [2020-10-15 00:11:59,770 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 706 transitions. Word has length 55 [2020-10-15 00:11:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:59,770 INFO L479 AbstractCegarLoop]: Abstraction has 581 states and 706 transitions. [2020-10-15 00:11:59,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:11:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 706 transitions. [2020-10-15 00:11:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 00:11:59,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:59,773 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:59,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:11:59,773 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1963459190, now seen corresponding path program 4 times [2020-10-15 00:11:59,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:59,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687203448] [2020-10-15 00:11:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 00:11:59,794 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 00:11:59,794 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 00:11:59,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:11:59,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:11:59 BoogieIcfgContainer [2020-10-15 00:11:59,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:11:59,824 INFO L168 Benchmark]: Toolchain (without parser) took 175123.42 ms. Allocated memory was 147.3 MB in the beginning and 1.0 GB in the end (delta: 900.2 MB). Free memory was 103.4 MB in the beginning and 387.5 MB in the end (delta: -284.1 MB). Peak memory consumption was 616.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,824 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.70 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,825 INFO L168 Benchmark]: Boogie Preprocessor took 119.09 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 181.1 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,825 INFO L168 Benchmark]: RCFGBuilder took 339.31 ms. Allocated memory is still 203.9 MB. Free memory was 181.1 MB in the beginning and 165.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,826 INFO L168 Benchmark]: TraceAbstraction took 174415.26 ms. Allocated memory was 203.9 MB in the beginning and 1.0 GB in the end (delta: 843.6 MB). Free memory was 164.1 MB in the beginning and 387.5 MB in the end (delta: -223.4 MB). Peak memory consumption was 620.2 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:59,828 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.70 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.09 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 181.1 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.31 ms. Allocated memory is still 203.9 MB. Free memory was 181.1 MB in the beginning and 165.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 174415.26 ms. Allocated memory was 203.9 MB in the beginning and 1.0 GB in the end (delta: 843.6 MB). Free memory was 164.1 MB in the beginning and 387.5 MB in the end (delta: -223.4 MB). Peak memory consumption was 620.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int SIZE=__VERIFIER_nondet_uint(); [L12] int i, j, k, key; [L13] int v[SIZE]; [L14] j=1 [L14] COND TRUE j=0) && (v[i]>key) [L17] EXPR v[i] [L17] (i>=0) && (v[i]>key) [L17] COND FALSE !((i>=0) && (v[i]>key)) [L22] v[i+1] = key [L14] j++ [L14] COND TRUE j=0) && (v[i]>key) [L17] EXPR v[i] [L17] (i>=0) && (v[i]>key) [L17] COND FALSE !((i>=0) && (v[i]>key)) [L22] v[i+1] = key [L14] j++ [L14] COND TRUE j=0) && (v[i]>key) [L17] EXPR v[i] [L17] (i>=0) && (v[i]>key) [L17] COND TRUE (i>=0) && (v[i]>key) [L18] COND FALSE !(i<2) [L20] i = i - 1 [L17] (i>=0) && (v[i]>key) [L17] EXPR v[i] [L17] (i>=0) && (v[i]>key) [L17] COND TRUE (i>=0) && (v[i]>key) [L18] COND TRUE i<2 [L19] EXPR v[i] [L19] v[i+1] = v[i] [L20] i = i - 1 [L17] (i>=0) && (v[i]>key) [L17] EXPR v[i] [L17] (i>=0) && (v[i]>key) [L17] COND FALSE !((i>=0) && (v[i]>key)) [L22] v[i+1] = key [L14] j++ [L14] COND FALSE !(j