/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:26:04,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:26:04,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:26:04,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:26:04,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:26:04,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:26:04,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:26:04,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:26:04,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:26:04,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:26:04,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:26:04,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:26:04,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:26:04,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:26:04,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:26:04,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:26:04,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:26:04,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:26:04,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:26:04,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:26:04,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:26:04,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:26:04,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:26:04,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:26:04,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:26:04,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:26:04,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:26:04,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:26:04,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:26:04,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:26:04,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:26:04,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:26:04,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:26:04,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:26:04,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:26:04,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:26:04,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:26:04,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:26:04,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:26:04,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:26:04,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:26:04,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:26:04,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:26:04,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:26:04,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:26:04,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:26:04,117 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:26:04,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:26:04,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:26:04,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:26:04,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:26:04,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:26:04,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:26:04,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:26:04,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:26:04,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:26:04,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:26:04,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:26:04,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:26:04,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:26:04,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:26:04,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:26:04,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:26:04,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:26:04,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:26:04,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:26:04,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:26:04,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:26:04,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:26:04,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:26:04,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:26:04,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:26:04,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:26:04,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:26:04,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:26:04,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:26:04,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:26:04,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr4.c [2020-10-12 10:26:04,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6335560/27403fa2f4954bbbb9ecb18187aa78f0/FLAG9ddd6ac55 [2020-10-12 10:26:04,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:26:04,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/nr4.c [2020-10-12 10:26:04,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6335560/27403fa2f4954bbbb9ecb18187aa78f0/FLAG9ddd6ac55 [2020-10-12 10:26:05,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6335560/27403fa2f4954bbbb9ecb18187aa78f0 [2020-10-12 10:26:05,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:26:05,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:26:05,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:26:05,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:26:05,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:26:05,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb9d797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05, skipping insertion in model container [2020-10-12 10:26:05,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:26:05,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:26:05,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:26:05,560 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:26:05,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:26:05,616 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:26:05,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05 WrapperNode [2020-10-12 10:26:05,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:26:05,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:26:05,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:26:05,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:26:05,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... [2020-10-12 10:26:05,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:26:05,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:26:05,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:26:05,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:26:05,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:26:05,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:26:05,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:26:05,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:26:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:26:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:26:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:26:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:26:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:26:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:26:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:26:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:26:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:26:06,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:26:06,152 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:26:06,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:26:06 BoogieIcfgContainer [2020-10-12 10:26:06,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:26:06,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:26:06,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:26:06,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:26:06,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:26:05" (1/3) ... [2020-10-12 10:26:06,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d961519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:26:06, skipping insertion in model container [2020-10-12 10:26:06,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:05" (2/3) ... [2020-10-12 10:26:06,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d961519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:26:06, skipping insertion in model container [2020-10-12 10:26:06,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:26:06" (3/3) ... [2020-10-12 10:26:06,166 INFO L109 eAbstractionObserver]: Analyzing ICFG nr4.c [2020-10-12 10:26:06,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:26:06,197 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:26:06,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:26:06,244 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:26:06,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:26:06,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:26:06,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:26:06,245 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:26:06,245 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:26:06,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:26:06,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:26:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 10:26:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:26:06,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:06,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:06,291 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1740462776, now seen corresponding path program 1 times [2020-10-12 10:26:06,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:06,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230337097] [2020-10-12 10:26:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:06,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:26:06,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:06,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-12 10:26:06,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:26:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:26:07,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:07,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:07,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:26:07,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:07,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:07,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:26:07,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:26:07,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:07,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:07,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 10:26:07,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:07,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:07,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230337097] [2020-10-12 10:26:07,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:07,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:26:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622724693] [2020-10-12 10:26:07,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:26:07,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:07,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:26:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:07,121 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-12 10:26:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:07,324 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-10-12 10:26:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:26:07,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 10:26:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:07,336 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:26:07,337 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:26:07,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:26:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-12 10:26:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:26:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-12 10:26:07,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-10-12 10:26:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:07,390 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-12 10:26:07,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:26:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-12 10:26:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:26:07,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:07,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:07,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:26:07,392 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1384584959, now seen corresponding path program 1 times [2020-10-12 10:26:07,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:07,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874407821] [2020-10-12 10:26:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:08,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:26:08,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:26:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-12 10:26:08,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:26:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:26:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:26:08,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:08,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:08,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:08,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:08,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:08,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:08,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:08,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:08,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:08,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:08,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 10:26:08,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:08,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874407821] [2020-10-12 10:26:08,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:08,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 10:26:08,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727398220] [2020-10-12 10:26:08,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:26:08,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:26:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:26:08,504 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-12 10:26:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:08,895 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-12 10:26:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:26:08,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 10:26:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:08,902 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:26:08,902 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:26:08,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:26:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:26:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-12 10:26:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:26:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 10:26:08,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2020-10-12 10:26:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:08,925 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 10:26:08,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:26:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 10:26:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:26:08,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:08,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:08,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:26:08,927 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash -112997622, now seen corresponding path program 1 times [2020-10-12 10:26:08,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:08,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938304032] [2020-10-12 10:26:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:08,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:26:08,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:08,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 10:26:08,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:26:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:26:08,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:09,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:09,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:09,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:09,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:09,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:09,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:09,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:09,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:09,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938304032] [2020-10-12 10:26:09,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:09,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:26:09,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949344196] [2020-10-12 10:26:09,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:26:09,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:26:09,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:26:09,029 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-10-12 10:26:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:09,099 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-12 10:26:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:26:09,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-12 10:26:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:09,101 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:26:09,101 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:26:09,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:26:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:26:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 10:26:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:26:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 10:26:09,110 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2020-10-12 10:26:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:09,111 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 10:26:09,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:26:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 10:26:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:26:09,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:09,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:09,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:26:09,113 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1279331720, now seen corresponding path program 1 times [2020-10-12 10:26:09,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:09,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897074852] [2020-10-12 10:26:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:09,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:26:09,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:09,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-12 10:26:09,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:26:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:26:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:09,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:09,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:09,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:09,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:09,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:09,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:09,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:09,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:09,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897074852] [2020-10-12 10:26:09,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:09,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:26:09,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512480524] [2020-10-12 10:26:09,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:26:09,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:09,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:26:09,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:09,622 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-12 10:26:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:09,879 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-12 10:26:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:26:09,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 10:26:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:09,881 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:26:09,881 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:26:09,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:26:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2020-10-12 10:26:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:26:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 10:26:09,893 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2020-10-12 10:26:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:09,894 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 10:26:09,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:26:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 10:26:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:26:09,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:09,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:09,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:26:09,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1021166282, now seen corresponding path program 1 times [2020-10-12 10:26:09,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:09,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54527615] [2020-10-12 10:26:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:10,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:26:10,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:10,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-12 10:26:10,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:10,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:26:10,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:10,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:26:10,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:10,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:10,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:10,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:10,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:10,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:10,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:10,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:10,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:10,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:10,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:10,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:10,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:10,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:10,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:10,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:10,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54527615] [2020-10-12 10:26:10,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:10,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:26:10,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120210360] [2020-10-12 10:26:10,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:26:10,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:26:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:26:10,322 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-12 10:26:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:10,718 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 10:26:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:10,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 10:26:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:10,721 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:26:10,721 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:26:10,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:26:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:26:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-10-12 10:26:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:26:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:26:10,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 28 [2020-10-12 10:26:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:10,736 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:26:10,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:26:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:26:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:26:10,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:10,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:10,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:26:10,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -994855160, now seen corresponding path program 1 times [2020-10-12 10:26:10,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:10,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229140690] [2020-10-12 10:26:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:11,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:26:11,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-12 10:26:11,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:26:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:26:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:11,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:11,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:11,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:11,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:11,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:11,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:11,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:11,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:11,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:11,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:11,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:11,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:11,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229140690] [2020-10-12 10:26:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:11,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:26:11,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324058964] [2020-10-12 10:26:11,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:26:11,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:26:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:26:11,502 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-10-12 10:26:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:11,836 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-10-12 10:26:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:11,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-12 10:26:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:11,838 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:26:11,838 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:26:11,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:26:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:26:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2020-10-12 10:26:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:26:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:26:11,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 31 [2020-10-12 10:26:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:26:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:26:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:26:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:26:11,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:11,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:11,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:26:11,853 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1762083020, now seen corresponding path program 2 times [2020-10-12 10:26:11,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:11,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746782897] [2020-10-12 10:26:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:12,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:26:12,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:12,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-12 10:26:12,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:26:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:12,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:26:12,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:12,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:12,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:12,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:12,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:12,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:12,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:12,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:12,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:12,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:12,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:12,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:12,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746782897] [2020-10-12 10:26:12,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:12,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:26:12,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575418341] [2020-10-12 10:26:12,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:26:12,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:26:12,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:26:12,948 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 11 states. [2020-10-12 10:26:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:13,493 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-10-12 10:26:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:13,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-12 10:26:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:13,496 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:26:13,496 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:26:13,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:26:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2020-10-12 10:26:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:26:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-12 10:26:13,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-10-12 10:26:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:13,510 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-12 10:26:13,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:26:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-12 10:26:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:26:13,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:13,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:13,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:26:13,512 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1906551953, now seen corresponding path program 3 times [2020-10-12 10:26:13,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:13,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678990356] [2020-10-12 10:26:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:13,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:14,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:14,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:14,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:26:14,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:14,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-12 10:26:14,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:14,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:26:14,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:15,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:15,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:15,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:15,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:15,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:15,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:15,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:15,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:15,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:26:15,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678990356] [2020-10-12 10:26:15,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:15,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:26:15,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811672372] [2020-10-12 10:26:15,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:26:15,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:26:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:26:15,064 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-10-12 10:26:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:15,652 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-12 10:26:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:26:15,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 10:26:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:15,654 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:26:15,654 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:26:15,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:26:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:26:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2020-10-12 10:26:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:26:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-12 10:26:15,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 34 [2020-10-12 10:26:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:15,672 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-12 10:26:15,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:26:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-12 10:26:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:26:15,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:15,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:15,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:26:15,674 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash -378315451, now seen corresponding path program 1 times [2020-10-12 10:26:15,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:15,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771673238] [2020-10-12 10:26:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:26:15,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:26:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 10:26:15,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:26:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:26:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:15,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:15,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:15,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:15,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:26:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:15,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:26:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:15,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:15,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:15,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:15,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:15,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:26:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:26:15,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771673238] [2020-10-12 10:26:15,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:15,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:26:15,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104645829] [2020-10-12 10:26:15,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:26:15,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:26:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:15,897 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-10-12 10:26:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:16,000 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-12 10:26:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:26:16,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-12 10:26:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:16,001 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:26:16,002 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:26:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:26:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 10:26:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:26:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 10:26:16,018 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2020-10-12 10:26:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:16,019 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 10:26:16,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:26:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 10:26:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:26:16,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:16,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:16,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:26:16,023 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1324006069, now seen corresponding path program 1 times [2020-10-12 10:26:16,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:16,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277689347] [2020-10-12 10:26:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:16,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:16,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:26:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-12 10:26:16,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:26:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:26:16,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:16,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:16,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:16,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:16,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:16,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:16,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:16,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:16,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:16,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:16,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:16,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:16,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:16,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:16,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:16,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:16,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:16,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:16,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:16,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:16,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:16,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:16,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:16,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:16,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:16,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:16,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:16,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277689347] [2020-10-12 10:26:16,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:16,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:26:16,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322896404] [2020-10-12 10:26:16,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:26:16,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:26:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:26:16,668 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 12 states. [2020-10-12 10:26:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:17,187 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2020-10-12 10:26:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:26:17,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-12 10:26:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:17,189 INFO L225 Difference]: With dead ends: 141 [2020-10-12 10:26:17,189 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 10:26:17,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:26:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 10:26:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2020-10-12 10:26:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 10:26:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-12 10:26:17,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 40 [2020-10-12 10:26:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:17,213 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-12 10:26:17,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:26:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-12 10:26:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:26:17,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:17,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:26:17,220 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 344590727, now seen corresponding path program 2 times [2020-10-12 10:26:17,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628310624] [2020-10-12 10:26:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:18,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:26:18,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:26:18,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-10-12 10:26:18,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:26:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:26:18,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:18,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:18,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:18,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:18,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:18,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:18,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:18,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:18,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:18,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:18,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:18,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:18,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:18,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:18,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:18,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:18,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:18,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:18,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:18,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:18,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:18,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:18,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628310624] [2020-10-12 10:26:18,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:18,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:26:18,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441064514] [2020-10-12 10:26:18,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:26:18,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:26:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:18,685 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 14 states. [2020-10-12 10:26:19,444 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2020-10-12 10:26:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:19,922 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2020-10-12 10:26:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:26:19,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-12 10:26:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:19,925 INFO L225 Difference]: With dead ends: 190 [2020-10-12 10:26:19,925 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 10:26:19,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:26:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 10:26:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 137. [2020-10-12 10:26:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 10:26:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2020-10-12 10:26:19,953 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 43 [2020-10-12 10:26:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:19,954 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2020-10-12 10:26:19,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:26:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2020-10-12 10:26:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:26:19,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:19,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:19,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:26:19,957 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2027148535, now seen corresponding path program 3 times [2020-10-12 10:26:19,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:19,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784194331] [2020-10-12 10:26:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:21,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:26:21,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:26:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1692 [2020-10-12 10:26:21,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:26:21,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:21,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:21,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:21,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:21,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:21,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:21,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:21,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:21,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:21,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:26:21,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:26:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:26:21,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784194331] [2020-10-12 10:26:21,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:21,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:26:21,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243532985] [2020-10-12 10:26:21,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:26:21,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:26:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:26:21,859 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand 11 states. [2020-10-12 10:26:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:22,381 INFO L93 Difference]: Finished difference Result 210 states and 271 transitions. [2020-10-12 10:26:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:26:22,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-12 10:26:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:22,384 INFO L225 Difference]: With dead ends: 210 [2020-10-12 10:26:22,385 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 10:26:22,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:26:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 10:26:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 149. [2020-10-12 10:26:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 10:26:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2020-10-12 10:26:22,428 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 43 [2020-10-12 10:26:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:22,429 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2020-10-12 10:26:22,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:26:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2020-10-12 10:26:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:26:22,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:22,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:22,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:26:22,435 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1256701511, now seen corresponding path program 1 times [2020-10-12 10:26:22,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:22,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891617500] [2020-10-12 10:26:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:26:23,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:23,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-12 10:26:23,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:26:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:26:23,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:23,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:23,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:23,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:23,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:23,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:23,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:23,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:23,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:23,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:23,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891617500] [2020-10-12 10:26:23,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:23,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:26:23,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453362381] [2020-10-12 10:26:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:26:23,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:26:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:26:23,766 INFO L87 Difference]: Start difference. First operand 149 states and 192 transitions. Second operand 11 states. [2020-10-12 10:26:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:24,435 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2020-10-12 10:26:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:26:24,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-12 10:26:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:24,438 INFO L225 Difference]: With dead ends: 274 [2020-10-12 10:26:24,438 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 10:26:24,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 10:26:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 185. [2020-10-12 10:26:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 10:26:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 244 transitions. [2020-10-12 10:26:24,464 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 244 transitions. Word has length 43 [2020-10-12 10:26:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:24,464 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 244 transitions. [2020-10-12 10:26:24,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:26:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 244 transitions. [2020-10-12 10:26:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:26:24,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:24,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:24,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:26:24,466 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash 218206967, now seen corresponding path program 4 times [2020-10-12 10:26:24,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:24,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834062006] [2020-10-12 10:26:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:25,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:26:25,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:26:25,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-12 10:26:25,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:25,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:26:25,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:25,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:26:25,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:25,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:25,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:25,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:25,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:25,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:25,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:25,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:25,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:25,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:25,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:25,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:25,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:25,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:26:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:25,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:25,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:25,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:26:25,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834062006] [2020-10-12 10:26:25,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:25,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:26:25,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111736436] [2020-10-12 10:26:25,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:26:25,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:26:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:26:25,524 INFO L87 Difference]: Start difference. First operand 185 states and 244 transitions. Second operand 13 states. [2020-10-12 10:26:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:26,153 INFO L93 Difference]: Finished difference Result 259 states and 335 transitions. [2020-10-12 10:26:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:26:26,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-12 10:26:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:26,156 INFO L225 Difference]: With dead ends: 259 [2020-10-12 10:26:26,156 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 10:26:26,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:26:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 10:26:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2020-10-12 10:26:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 10:26:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2020-10-12 10:26:26,190 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 218 transitions. Word has length 46 [2020-10-12 10:26:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:26,190 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 218 transitions. [2020-10-12 10:26:26,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:26:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 218 transitions. [2020-10-12 10:26:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:26,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:26,192 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:26,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:26:26,193 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1149798824, now seen corresponding path program 5 times [2020-10-12 10:26:26,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:26,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901297655] [2020-10-12 10:26:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:26,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:27,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:26:27,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-12 10:26:27,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:26:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:26:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:27,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:27,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:27,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:27,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:27,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901297655] [2020-10-12 10:26:27,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:27,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:26:27,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311591693] [2020-10-12 10:26:27,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:26:27,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:26:27,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:26:27,714 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand 13 states. [2020-10-12 10:26:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:28,731 INFO L93 Difference]: Finished difference Result 345 states and 454 transitions. [2020-10-12 10:26:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:26:28,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-12 10:26:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:28,734 INFO L225 Difference]: With dead ends: 345 [2020-10-12 10:26:28,734 INFO L226 Difference]: Without dead ends: 329 [2020-10-12 10:26:28,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:26:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-12 10:26:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 266. [2020-10-12 10:26:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-12 10:26:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 356 transitions. [2020-10-12 10:26:28,778 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 356 transitions. Word has length 49 [2020-10-12 10:26:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:28,779 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 356 transitions. [2020-10-12 10:26:28,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:26:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 356 transitions. [2020-10-12 10:26:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:28,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:28,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:28,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:26:28,781 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -728026068, now seen corresponding path program 1 times [2020-10-12 10:26:28,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:28,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688106702] [2020-10-12 10:26:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:28,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:30,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:26:30,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1493 [2020-10-12 10:26:30,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:26:30,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:30,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:26:30,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:30,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:30,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:30,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:30,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:30,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:30,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:30,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:30,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:30,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688106702] [2020-10-12 10:26:30,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:30,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:26:30,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108041316] [2020-10-12 10:26:30,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:26:30,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:26:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:26:30,490 INFO L87 Difference]: Start difference. First operand 266 states and 356 transitions. Second operand 15 states. [2020-10-12 10:26:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:32,106 INFO L93 Difference]: Finished difference Result 497 states and 656 transitions. [2020-10-12 10:26:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:26:32,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-12 10:26:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:32,110 INFO L225 Difference]: With dead ends: 497 [2020-10-12 10:26:32,110 INFO L226 Difference]: Without dead ends: 495 [2020-10-12 10:26:32,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:26:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-12 10:26:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 347. [2020-10-12 10:26:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-12 10:26:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 466 transitions. [2020-10-12 10:26:32,173 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 466 transitions. Word has length 49 [2020-10-12 10:26:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:32,173 INFO L479 AbstractCegarLoop]: Abstraction has 347 states and 466 transitions. [2020-10-12 10:26:32,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:26:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 466 transitions. [2020-10-12 10:26:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:32,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:32,175 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:32,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:26:32,176 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -970143106, now seen corresponding path program 6 times [2020-10-12 10:26:32,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:32,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049133007] [2020-10-12 10:26:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2342 [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:26:34,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:34,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:34,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:34,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:34,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:34,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:34,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:34,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:26:34,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:34,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:26:34,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:34,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:34,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:34,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:34,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049133007] [2020-10-12 10:26:34,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:34,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:26:34,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923585374] [2020-10-12 10:26:34,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:26:34,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:26:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:26:34,832 INFO L87 Difference]: Start difference. First operand 347 states and 466 transitions. Second operand 16 states. [2020-10-12 10:26:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:35,864 INFO L93 Difference]: Finished difference Result 606 states and 810 transitions. [2020-10-12 10:26:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:26:35,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-12 10:26:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:35,868 INFO L225 Difference]: With dead ends: 606 [2020-10-12 10:26:35,868 INFO L226 Difference]: Without dead ends: 604 [2020-10-12 10:26:35,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:26:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-12 10:26:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 425. [2020-10-12 10:26:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-12 10:26:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 575 transitions. [2020-10-12 10:26:35,932 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 575 transitions. Word has length 49 [2020-10-12 10:26:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:35,932 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 575 transitions. [2020-10-12 10:26:35,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:26:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 575 transitions. [2020-10-12 10:26:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:35,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:35,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:35,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:26:35,935 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1042529664, now seen corresponding path program 7 times [2020-10-12 10:26:35,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:35,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533473502] [2020-10-12 10:26:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:26:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:40,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:40,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:41,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:41,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:41,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:41,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:41,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:41,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:26:41,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533473502] [2020-10-12 10:26:41,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:41,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:26:41,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752260060] [2020-10-12 10:26:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:26:41,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:26:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:26:41,290 INFO L87 Difference]: Start difference. First operand 425 states and 575 transitions. Second operand 17 states. [2020-10-12 10:26:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:42,734 INFO L93 Difference]: Finished difference Result 605 states and 812 transitions. [2020-10-12 10:26:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:26:42,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-12 10:26:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:42,741 INFO L225 Difference]: With dead ends: 605 [2020-10-12 10:26:42,741 INFO L226 Difference]: Without dead ends: 603 [2020-10-12 10:26:42,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:26:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-12 10:26:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 489. [2020-10-12 10:26:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-12 10:26:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 663 transitions. [2020-10-12 10:26:42,825 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 663 transitions. Word has length 49 [2020-10-12 10:26:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:42,825 INFO L479 AbstractCegarLoop]: Abstraction has 489 states and 663 transitions. [2020-10-12 10:26:42,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:26:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 663 transitions. [2020-10-12 10:26:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:42,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:42,828 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:42,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:26:42,829 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2053646914, now seen corresponding path program 2 times [2020-10-12 10:26:42,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:42,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036273540] [2020-10-12 10:26:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:45,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:45,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:26:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2879 [2020-10-12 10:26:45,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:26:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:45,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:45,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:45,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:45,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:45,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:45,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:45,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:26:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:45,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:45,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:45,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:45,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:45,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:45,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:45,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:45,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:45,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:45,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:45,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:45,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:45,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:26:45,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036273540] [2020-10-12 10:26:45,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:45,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:26:45,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870197300] [2020-10-12 10:26:45,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:26:45,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:26:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:26:45,933 INFO L87 Difference]: Start difference. First operand 489 states and 663 transitions. Second operand 15 states. [2020-10-12 10:26:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:47,201 INFO L93 Difference]: Finished difference Result 630 states and 844 transitions. [2020-10-12 10:26:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:26:47,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-12 10:26:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:47,205 INFO L225 Difference]: With dead ends: 630 [2020-10-12 10:26:47,206 INFO L226 Difference]: Without dead ends: 628 [2020-10-12 10:26:47,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:26:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-10-12 10:26:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 435. [2020-10-12 10:26:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 10:26:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 585 transitions. [2020-10-12 10:26:47,279 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 585 transitions. Word has length 49 [2020-10-12 10:26:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:47,280 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 585 transitions. [2020-10-12 10:26:47,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:26:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 585 transitions. [2020-10-12 10:26:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:47,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:47,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:47,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:26:47,283 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1246288917, now seen corresponding path program 8 times [2020-10-12 10:26:47,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:47,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447673667] [2020-10-12 10:26:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:26:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:49,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:49,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:49,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:49,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:49,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:49,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:49,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:49,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:49,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:49,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:49,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:49,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:26:49,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:49,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:49,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:49,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:49,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:49,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:49,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:26:49,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:49,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:49,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:49,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:49,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:49,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:49,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:49,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:26:49,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447673667] [2020-10-12 10:26:49,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:49,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:26:49,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925034065] [2020-10-12 10:26:49,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:26:49,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:26:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:49,926 INFO L87 Difference]: Start difference. First operand 435 states and 585 transitions. Second operand 20 states. [2020-10-12 10:26:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:52,410 INFO L93 Difference]: Finished difference Result 550 states and 737 transitions. [2020-10-12 10:26:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:26:52,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-12 10:26:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:52,415 INFO L225 Difference]: With dead ends: 550 [2020-10-12 10:26:52,415 INFO L226 Difference]: Without dead ends: 548 [2020-10-12 10:26:52,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:26:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-12 10:26:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 491. [2020-10-12 10:26:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-12 10:26:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 662 transitions. [2020-10-12 10:26:52,499 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 662 transitions. Word has length 58 [2020-10-12 10:26:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:52,500 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 662 transitions. [2020-10-12 10:26:52,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:26:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 662 transitions. [2020-10-12 10:26:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:52,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:52,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:52,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:26:52,503 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash -559149417, now seen corresponding path program 9 times [2020-10-12 10:26:52,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:52,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320120069] [2020-10-12 10:26:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:26:53,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:26:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:53,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:53,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:53,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:53,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:53,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:53,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:53,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:53,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:53,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:53,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:53,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:53,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:53,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:53,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:53,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:26:53,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320120069] [2020-10-12 10:26:53,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:53,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:26:53,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342497378] [2020-10-12 10:26:53,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:26:53,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:26:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:26:53,823 INFO L87 Difference]: Start difference. First operand 491 states and 662 transitions. Second operand 21 states. [2020-10-12 10:26:54,546 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 10:26:54,943 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-12 10:26:55,211 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 10:26:55,620 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-12 10:26:55,989 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 10:26:56,332 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 10:26:56,599 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-12 10:26:56,856 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 10:26:57,115 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-12 10:26:57,310 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 10:26:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:58,368 INFO L93 Difference]: Finished difference Result 578 states and 773 transitions. [2020-10-12 10:26:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:26:58,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-12 10:26:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:58,372 INFO L225 Difference]: With dead ends: 578 [2020-10-12 10:26:58,372 INFO L226 Difference]: Without dead ends: 576 [2020-10-12 10:26:58,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:26:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-10-12 10:26:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 505. [2020-10-12 10:26:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 10:26:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 680 transitions. [2020-10-12 10:26:58,442 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 680 transitions. Word has length 58 [2020-10-12 10:26:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:58,443 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 680 transitions. [2020-10-12 10:26:58,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:26:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 680 transitions. [2020-10-12 10:26:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:58,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:58,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:58,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:26:58,446 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1769195025, now seen corresponding path program 2 times [2020-10-12 10:26:58,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:58,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387257693] [2020-10-12 10:26:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:27:02,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:27:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4002 [2020-10-12 10:27:02,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:27:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:27:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:02,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:02,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:02,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:02,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:02,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:27:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:02,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:02,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:02,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:27:02,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387257693] [2020-10-12 10:27:02,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:02,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:27:02,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124890580] [2020-10-12 10:27:02,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:27:02,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:27:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:27:02,863 INFO L87 Difference]: Start difference. First operand 505 states and 680 transitions. Second operand 17 states. [2020-10-12 10:27:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:04,467 INFO L93 Difference]: Finished difference Result 750 states and 1005 transitions. [2020-10-12 10:27:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:27:04,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-12 10:27:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:04,474 INFO L225 Difference]: With dead ends: 750 [2020-10-12 10:27:04,474 INFO L226 Difference]: Without dead ends: 748 [2020-10-12 10:27:04,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:27:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-12 10:27:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 525. [2020-10-12 10:27:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-10-12 10:27:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 704 transitions. [2020-10-12 10:27:04,567 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 704 transitions. Word has length 58 [2020-10-12 10:27:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:04,568 INFO L479 AbstractCegarLoop]: Abstraction has 525 states and 704 transitions. [2020-10-12 10:27:04,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:27:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 704 transitions. [2020-10-12 10:27:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:27:04,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:04,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:04,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:27:04,571 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:04,571 INFO L82 PathProgramCache]: Analyzing trace with hash -293559295, now seen corresponding path program 10 times [2020-10-12 10:27:04,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:04,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382095456] [2020-10-12 10:27:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:09,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:27:09,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 10:27:09,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:27:09,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:27:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:27:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 10:27:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:10,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:10,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:10,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:10,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:27:10,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382095456] [2020-10-12 10:27:10,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:10,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:27:10,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89055294] [2020-10-12 10:27:10,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:27:10,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:27:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:27:10,717 INFO L87 Difference]: Start difference. First operand 525 states and 704 transitions. Second operand 21 states. [2020-10-12 10:27:11,833 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 10:27:12,008 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-12 10:27:12,367 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-12 10:27:12,637 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 10:27:13,471 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-12 10:27:13,642 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 10:27:13,849 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-12 10:27:14,090 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-12 10:27:14,284 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-12 10:27:15,138 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 10:27:15,367 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-12 10:27:15,529 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-12 10:27:15,861 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-12 10:27:16,131 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 10:27:16,461 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-12 10:27:16,672 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 10:27:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:16,753 INFO L93 Difference]: Finished difference Result 815 states and 1086 transitions. [2020-10-12 10:27:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:27:16,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-12 10:27:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:16,758 INFO L225 Difference]: With dead ends: 815 [2020-10-12 10:27:16,758 INFO L226 Difference]: Without dead ends: 786 [2020-10-12 10:27:16,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:27:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-10-12 10:27:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 474. [2020-10-12 10:27:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-12 10:27:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 635 transitions. [2020-10-12 10:27:16,837 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 635 transitions. Word has length 58 [2020-10-12 10:27:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:16,838 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 635 transitions. [2020-10-12 10:27:16,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:27:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 635 transitions. [2020-10-12 10:27:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:27:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:16,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:16,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:27:16,841 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -984143493, now seen corresponding path program 11 times [2020-10-12 10:27:16,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:16,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352083280] [2020-10-12 10:27:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:16,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:16,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:16,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:27:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:27:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:19,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:19,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:19,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:19,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:19,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:19,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:19,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:19,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:19,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:27:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352083280] [2020-10-12 10:27:19,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:19,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:27:19,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700012760] [2020-10-12 10:27:19,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:27:19,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:27:19,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:27:19,328 INFO L87 Difference]: Start difference. First operand 474 states and 635 transitions. Second operand 18 states. [2020-10-12 10:27:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:22,292 INFO L93 Difference]: Finished difference Result 814 states and 1079 transitions. [2020-10-12 10:27:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 10:27:22,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-12 10:27:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:22,298 INFO L225 Difference]: With dead ends: 814 [2020-10-12 10:27:22,298 INFO L226 Difference]: Without dead ends: 812 [2020-10-12 10:27:22,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=514, Invalid=3268, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:27:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-10-12 10:27:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 477. [2020-10-12 10:27:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 10:27:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 639 transitions. [2020-10-12 10:27:22,394 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 639 transitions. Word has length 58 [2020-10-12 10:27:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:22,394 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 639 transitions. [2020-10-12 10:27:22,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:27:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 639 transitions. [2020-10-12 10:27:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:22,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:22,396 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:22,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:27:22,396 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 163940230, now seen corresponding path program 12 times [2020-10-12 10:27:22,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:22,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228477740] [2020-10-12 10:27:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 10:27:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:24,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:27:24,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:27:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:24,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:27:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 10:27:24,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228477740] [2020-10-12 10:27:24,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:24,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:27:24,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905856493] [2020-10-12 10:27:24,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:27:24,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:27:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:27:24,367 INFO L87 Difference]: Start difference. First operand 477 states and 639 transitions. Second operand 14 states. [2020-10-12 10:27:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:25,243 INFO L93 Difference]: Finished difference Result 795 states and 1046 transitions. [2020-10-12 10:27:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:27:25,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-12 10:27:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:25,247 INFO L225 Difference]: With dead ends: 795 [2020-10-12 10:27:25,247 INFO L226 Difference]: Without dead ends: 654 [2020-10-12 10:27:25,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:27:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-12 10:27:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 481. [2020-10-12 10:27:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-12 10:27:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 637 transitions. [2020-10-12 10:27:25,352 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 637 transitions. Word has length 67 [2020-10-12 10:27:25,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:25,352 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 637 transitions. [2020-10-12 10:27:25,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:27:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 637 transitions. [2020-10-12 10:27:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:25,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:25,355 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:27:25,355 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1416893538, now seen corresponding path program 13 times [2020-10-12 10:27:25,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:25,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628967758] [2020-10-12 10:27:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:27:30,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,638 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2020-10-12 10:27:30,785 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2020-10-12 10:27:31,154 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 51 [2020-10-12 10:27:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:31,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:31,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:27:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:31,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:31,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:31,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:31,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:31,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:31,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:31,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:31,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:31,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:31,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:31,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:31,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:27:31,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628967758] [2020-10-12 10:27:31,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:31,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:27:31,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940509802] [2020-10-12 10:27:31,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:27:31,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:27:31,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:27:31,693 INFO L87 Difference]: Start difference. First operand 481 states and 637 transitions. Second operand 23 states. [2020-10-12 10:27:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:34,578 INFO L93 Difference]: Finished difference Result 1051 states and 1410 transitions. [2020-10-12 10:27:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:27:34,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-10-12 10:27:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:34,582 INFO L225 Difference]: With dead ends: 1051 [2020-10-12 10:27:34,583 INFO L226 Difference]: Without dead ends: 804 [2020-10-12 10:27:34,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:27:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-10-12 10:27:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 579. [2020-10-12 10:27:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-12 10:27:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 767 transitions. [2020-10-12 10:27:34,720 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 767 transitions. Word has length 67 [2020-10-12 10:27:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:34,721 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 767 transitions. [2020-10-12 10:27:34,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:27:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 767 transitions. [2020-10-12 10:27:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:34,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:34,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2020-10-12 10:27:34,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:27:34,724 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1072635424, now seen corresponding path program 14 times [2020-10-12 10:27:34,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:34,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457522473] [2020-10-12 10:27:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:34,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:38,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:39,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:39,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:39,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 10:27:39,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4481 [2020-10-12 10:27:39,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:27:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:27:39,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:40,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:40,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:40,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:40,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:40,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:40,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:40,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:40,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:40,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:27:40,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:40,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:40,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:40,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:40,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:40,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 10:27:40,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457522473] [2020-10-12 10:27:40,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:40,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:27:40,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721746516] [2020-10-12 10:27:40,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:27:40,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:27:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:27:40,402 INFO L87 Difference]: Start difference. First operand 579 states and 767 transitions. Second operand 24 states. [2020-10-12 10:27:41,719 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 10:27:42,897 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 10:27:43,088 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-12 10:27:43,258 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 10:27:43,477 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 10:27:43,695 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 10:27:43,856 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 10:27:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:45,022 INFO L93 Difference]: Finished difference Result 1108 states and 1475 transitions. [2020-10-12 10:27:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:27:45,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-12 10:27:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:45,027 INFO L225 Difference]: With dead ends: 1108 [2020-10-12 10:27:45,027 INFO L226 Difference]: Without dead ends: 775 [2020-10-12 10:27:45,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=383, Invalid=3039, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:27:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-12 10:27:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 635. [2020-10-12 10:27:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-12 10:27:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 836 transitions. [2020-10-12 10:27:45,189 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 836 transitions. Word has length 67 [2020-10-12 10:27:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:45,189 INFO L479 AbstractCegarLoop]: Abstraction has 635 states and 836 transitions. [2020-10-12 10:27:45,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:27:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 836 transitions. [2020-10-12 10:27:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:45,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:45,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:45,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:27:45,194 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash -161629602, now seen corresponding path program 15 times [2020-10-12 10:27:45,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:45,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943608219] [2020-10-12 10:27:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:46,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:27:50,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:50,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:50,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:50,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:50,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:50,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:27:50,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:50,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:50,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:50,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:27:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:27:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:50,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:50,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:50,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:50,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 10:27:50,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943608219] [2020-10-12 10:27:50,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:50,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:27:50,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240181023] [2020-10-12 10:27:50,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:27:50,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:50,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:27:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:27:50,676 INFO L87 Difference]: Start difference. First operand 635 states and 836 transitions. Second operand 17 states. [2020-10-12 10:27:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:51,973 INFO L93 Difference]: Finished difference Result 871 states and 1144 transitions. [2020-10-12 10:27:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:27:51,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-12 10:27:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:51,977 INFO L225 Difference]: With dead ends: 871 [2020-10-12 10:27:51,977 INFO L226 Difference]: Without dead ends: 665 [2020-10-12 10:27:51,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:27:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-10-12 10:27:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 558. [2020-10-12 10:27:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-10-12 10:27:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 724 transitions. [2020-10-12 10:27:52,093 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 724 transitions. Word has length 67 [2020-10-12 10:27:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:52,094 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 724 transitions. [2020-10-12 10:27:52,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:27:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 724 transitions. [2020-10-12 10:27:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:52,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:52,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:52,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:27:52,096 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -955950686, now seen corresponding path program 16 times [2020-10-12 10:27:52,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:52,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819207446] [2020-10-12 10:27:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:52,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:57,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:57,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:57,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 10:27:57,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:27:57,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:27:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:27:57,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:57,585 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-10-12 10:27:58,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:58,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:58,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:58,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:58,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:58,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:58,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:58,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:58,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:58,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:58,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:58,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:58,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:58,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:58,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:58,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:58,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:58,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 10:27:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819207446] [2020-10-12 10:27:58,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:58,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:27:58,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460290186] [2020-10-12 10:27:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:27:58,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:27:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:27:58,139 INFO L87 Difference]: Start difference. First operand 558 states and 724 transitions. Second operand 20 states. [2020-10-12 10:27:59,105 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-12 10:27:59,379 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-12 10:27:59,654 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 10:28:00,054 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-12 10:28:00,473 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 10:28:00,814 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 10:28:01,108 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-12 10:28:01,508 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 10:28:01,829 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-12 10:28:02,177 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 10:28:02,775 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 10:28:03,173 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:28:03,463 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-12 10:28:03,830 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 10:28:04,115 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-12 10:28:04,536 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-12 10:28:04,808 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-12 10:28:05,065 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 10:28:05,366 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 10:28:05,591 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-12 10:28:05,997 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-12 10:28:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:06,027 INFO L93 Difference]: Finished difference Result 1180 states and 1540 transitions. [2020-10-12 10:28:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:28:06,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-12 10:28:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:06,031 INFO L225 Difference]: With dead ends: 1180 [2020-10-12 10:28:06,031 INFO L226 Difference]: Without dead ends: 659 [2020-10-12 10:28:06,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=510, Invalid=3780, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 10:28:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-12 10:28:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 463. [2020-10-12 10:28:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-10-12 10:28:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 592 transitions. [2020-10-12 10:28:06,157 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 592 transitions. Word has length 67 [2020-10-12 10:28:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:06,158 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 592 transitions. [2020-10-12 10:28:06,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:28:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 592 transitions. [2020-10-12 10:28:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:28:06,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:06,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:06,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:28:06,161 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1967067936, now seen corresponding path program 17 times [2020-10-12 10:28:06,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:06,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34231346] [2020-10-12 10:28:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:28:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:28:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:11,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:11,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:11,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:11,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:11,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:11,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:11,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:28:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:11,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:28:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:11,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:11,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:28:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:11,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:11,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:11,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:11,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:11,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 10:28:11,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34231346] [2020-10-12 10:28:11,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:11,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:28:11,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736669653] [2020-10-12 10:28:11,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:28:11,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:28:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:28:11,727 INFO L87 Difference]: Start difference. First operand 463 states and 592 transitions. Second operand 21 states. [2020-10-12 10:28:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:16,219 INFO L93 Difference]: Finished difference Result 686 states and 903 transitions. [2020-10-12 10:28:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 10:28:16,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-12 10:28:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:16,225 INFO L225 Difference]: With dead ends: 686 [2020-10-12 10:28:16,225 INFO L226 Difference]: Without dead ends: 684 [2020-10-12 10:28:16,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=594, Invalid=4662, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 10:28:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-12 10:28:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 513. [2020-10-12 10:28:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-12 10:28:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 666 transitions. [2020-10-12 10:28:16,400 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 666 transitions. Word has length 67 [2020-10-12 10:28:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:16,400 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 666 transitions. [2020-10-12 10:28:16,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:28:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 666 transitions. [2020-10-12 10:28:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:28:16,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:16,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:16,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:28:16,404 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:16,404 INFO L82 PathProgramCache]: Analyzing trace with hash 113130012, now seen corresponding path program 18 times [2020-10-12 10:28:16,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:16,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120987197] [2020-10-12 10:28:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:16,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:21,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:21,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:28:21,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 10:28:21,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:21,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:28:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:28:21,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:21,953 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-12 10:28:22,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:22,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:22,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:22,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:22,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:22,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:28:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:22,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:22,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:22,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:22,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:22,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:22,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:22,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:28:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:28:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:22,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:22,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:22,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:22,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:28:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120987197] [2020-10-12 10:28:22,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:22,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:28:22,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507430163] [2020-10-12 10:28:22,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:28:22,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:28:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:28:22,410 INFO L87 Difference]: Start difference. First operand 513 states and 666 transitions. Second operand 21 states. [2020-10-12 10:28:23,314 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 10:28:23,613 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-12 10:28:24,075 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-12 10:28:24,419 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-12 10:28:24,783 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 10:28:25,163 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-12 10:28:25,463 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-12 10:28:25,738 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-12 10:28:26,099 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-12 10:28:26,375 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-12 10:28:26,753 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-12 10:28:27,007 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 10:28:27,295 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-12 10:28:27,612 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 10:28:27,890 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-12 10:28:28,185 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-12 10:28:28,483 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-12 10:28:28,882 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-12 10:28:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:28,912 INFO L93 Difference]: Finished difference Result 676 states and 897 transitions. [2020-10-12 10:28:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:28:28,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-12 10:28:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:28,924 INFO L225 Difference]: With dead ends: 676 [2020-10-12 10:28:28,924 INFO L226 Difference]: Without dead ends: 674 [2020-10-12 10:28:28,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:28:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-10-12 10:28:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 563. [2020-10-12 10:28:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-12 10:28:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 738 transitions. [2020-10-12 10:28:29,078 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 738 transitions. Word has length 67 [2020-10-12 10:28:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:29,079 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 738 transitions. [2020-10-12 10:28:29,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:28:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 738 transitions. [2020-10-12 10:28:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:28:29,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:29,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:29,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:28:29,082 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1692308322, now seen corresponding path program 3 times [2020-10-12 10:28:29,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:29,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39644408] [2020-10-12 10:28:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:29,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:28:34,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:28:34,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:34,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:28:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:28:34,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:34,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:34,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:34,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:28:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:34,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:34,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:34,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:28:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:34,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:34,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:34,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:28:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:34,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:34,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:28:34,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39644408] [2020-10-12 10:28:34,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:34,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:28:34,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486440427] [2020-10-12 10:28:34,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:28:34,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:28:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:28:34,524 INFO L87 Difference]: Start difference. First operand 563 states and 738 transitions. Second operand 18 states. [2020-10-12 10:28:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:36,570 INFO L93 Difference]: Finished difference Result 869 states and 1142 transitions. [2020-10-12 10:28:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:28:36,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-12 10:28:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:36,581 INFO L225 Difference]: With dead ends: 869 [2020-10-12 10:28:36,581 INFO L226 Difference]: Without dead ends: 867 [2020-10-12 10:28:36,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:28:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-12 10:28:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 573. [2020-10-12 10:28:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-10-12 10:28:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 752 transitions. [2020-10-12 10:28:36,734 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 752 transitions. Word has length 67 [2020-10-12 10:28:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:36,735 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 752 transitions. [2020-10-12 10:28:36,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:28:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 752 transitions. [2020-10-12 10:28:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:28:36,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:36,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2020-10-12 10:28:36,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:28:36,737 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1600015810, now seen corresponding path program 19 times [2020-10-12 10:28:36,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:36,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96449844] [2020-10-12 10:28:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:41,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:28:41,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:28:41,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:28:41,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:28:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:28:41,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:42,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:42,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:42,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:28:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:42,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:28:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:28:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:42,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:28:42,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96449844] [2020-10-12 10:28:42,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:42,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:28:42,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038494780] [2020-10-12 10:28:42,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:28:42,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:28:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:28:42,621 INFO L87 Difference]: Start difference. First operand 573 states and 752 transitions. Second operand 21 states. [2020-10-12 10:28:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:45,797 INFO L93 Difference]: Finished difference Result 745 states and 972 transitions. [2020-10-12 10:28:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:28:45,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-12 10:28:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:45,808 INFO L225 Difference]: With dead ends: 745 [2020-10-12 10:28:45,808 INFO L226 Difference]: Without dead ends: 743 [2020-10-12 10:28:45,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:28:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-10-12 10:28:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 616. [2020-10-12 10:28:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-12 10:28:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 809 transitions. [2020-10-12 10:28:46,014 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 809 transitions. Word has length 70 [2020-10-12 10:28:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:46,014 INFO L479 AbstractCegarLoop]: Abstraction has 616 states and 809 transitions. [2020-10-12 10:28:46,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:28:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 809 transitions. [2020-10-12 10:28:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:28:46,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:46,017 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2020-10-12 10:28:46,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:28:46,017 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash -723996804, now seen corresponding path program 20 times [2020-10-12 10:28:46,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:46,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142710927] [2020-10-12 10:28:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:28:51,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:28:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:51,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:28:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:28:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,516 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-12 10:28:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:52,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:52,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:52,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:28:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:52,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:52,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:52,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:52,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:28:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:52,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:28:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:52,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:52,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:52,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:52,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 28 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 10:28:52,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142710927] [2020-10-12 10:28:52,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:52,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:28:52,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004045682] [2020-10-12 10:28:52,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:28:52,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:28:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:28:52,310 INFO L87 Difference]: Start difference. First operand 616 states and 809 transitions. Second operand 22 states. [2020-10-12 10:28:53,215 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 10:28:53,474 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-12 10:28:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:54,909 INFO L93 Difference]: Finished difference Result 816 states and 1086 transitions. [2020-10-12 10:28:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:28:54,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-12 10:28:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:54,914 INFO L225 Difference]: With dead ends: 816 [2020-10-12 10:28:54,915 INFO L226 Difference]: Without dead ends: 776 [2020-10-12 10:28:54,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:28:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-10-12 10:28:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 660. [2020-10-12 10:28:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-10-12 10:28:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 869 transitions. [2020-10-12 10:28:55,058 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 869 transitions. Word has length 70 [2020-10-12 10:28:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 869 transitions. [2020-10-12 10:28:55,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:28:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 869 transitions. [2020-10-12 10:28:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:28:55,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:55,061 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:55,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:28:55,061 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1735114054, now seen corresponding path program 21 times [2020-10-12 10:28:55,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:55,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821885540] [2020-10-12 10:28:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:55,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:00,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:29:00,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:29:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:29:00,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:29:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:29:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:29:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:00,527 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-10-12 10:29:00,918 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 10:29:01,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:29:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:01,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:29:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:01,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:01,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:01,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:29:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:01,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:29:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:01,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:01,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:01,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:29:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:29:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:01,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:01,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:29:01,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821885540] [2020-10-12 10:29:01,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:29:01,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:29:01,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937309740] [2020-10-12 10:29:01,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:29:01,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:29:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:29:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:29:01,827 INFO L87 Difference]: Start difference. First operand 660 states and 869 transitions. Second operand 23 states. [2020-10-12 10:29:02,995 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 10:29:03,331 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-12 10:29:03,556 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-12 10:29:04,098 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-12 10:29:04,512 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-12 10:29:05,276 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-12 10:29:05,570 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-12 10:29:05,994 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-12 10:29:06,632 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-12 10:29:06,967 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-12 10:29:07,524 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-12 10:29:07,709 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-12 10:29:07,872 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-12 10:29:08,556 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-12 10:29:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:29:08,625 INFO L93 Difference]: Finished difference Result 919 states and 1228 transitions. [2020-10-12 10:29:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:29:08,626 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-12 10:29:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:29:08,631 INFO L225 Difference]: With dead ends: 919 [2020-10-12 10:29:08,632 INFO L226 Difference]: Without dead ends: 917 [2020-10-12 10:29:08,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:29:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-10-12 10:29:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 767. [2020-10-12 10:29:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-12 10:29:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1016 transitions. [2020-10-12 10:29:08,801 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1016 transitions. Word has length 70 [2020-10-12 10:29:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:29:08,801 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1016 transitions. [2020-10-12 10:29:08,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:29:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1016 transitions. [2020-10-12 10:29:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:29:08,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:29:08,804 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:29:08,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:29:08,804 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:29:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:29:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1765532158, now seen corresponding path program 22 times [2020-10-12 10:29:08,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:29:08,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668811286] [2020-10-12 10:29:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:29:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:09,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:09,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:10,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:10,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:11,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:12,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:29:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:29:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 10:29:13,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:29:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:15,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:15,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:15,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:15,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:15,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:29:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:15,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:15,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:15,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:15,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:15,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:15,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:15,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:15,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:15,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:15,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:29:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:15,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:15,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:15,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:15,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:29:15,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:15,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:15,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:15,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:29:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:15,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:29:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:29:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:15,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:15,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:15,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:29:15,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668811286] [2020-10-12 10:29:15,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:29:15,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:29:15,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872822953] [2020-10-12 10:29:15,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:29:15,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:29:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:29:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:29:15,244 INFO L87 Difference]: Start difference. First operand 767 states and 1016 transitions. Second operand 25 states. [2020-10-12 10:29:16,490 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2020-10-12 10:29:16,802 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:29:17,035 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:29:17,446 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-12 10:29:17,657 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-12 10:29:17,871 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-12 10:29:18,802 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-12 10:29:19,482 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-12 10:29:20,281 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-12 10:29:20,865 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-12 10:29:21,161 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 10:29:21,435 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 10:29:22,716 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-12 10:29:24,742 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-12 10:29:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:29:25,134 INFO L93 Difference]: Finished difference Result 1189 states and 1578 transitions. [2020-10-12 10:29:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 10:29:25,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2020-10-12 10:29:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:29:25,140 INFO L225 Difference]: With dead ends: 1189 [2020-10-12 10:29:25,140 INFO L226 Difference]: Without dead ends: 1168 [2020-10-12 10:29:25,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=613, Invalid=5393, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 10:29:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-10-12 10:29:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 890. [2020-10-12 10:29:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-12 10:29:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1184 transitions. [2020-10-12 10:29:25,369 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1184 transitions. Word has length 70 [2020-10-12 10:29:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:29:25,370 INFO L479 AbstractCegarLoop]: Abstraction has 890 states and 1184 transitions. [2020-10-12 10:29:25,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:29:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1184 transitions. [2020-10-12 10:29:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:29:25,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:29:25,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2020-10-12 10:29:25,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:29:25,373 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:29:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:29:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 754414908, now seen corresponding path program 23 times [2020-10-12 10:29:25,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:29:25,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654989945] [2020-10-12 10:29:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:29:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:25,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:26,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:27,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:27,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:27,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:29,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:30,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:29:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:29:30,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:29:30,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:29:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:31,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:31,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:31,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:29:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:31,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:31,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:31,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:31,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:31,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:29:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:31,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:31,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:31,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:31,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:31,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:31,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:31,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:31,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:31,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:31,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:29:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:31,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:31,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:31,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:31,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:31,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:29:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:31,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:31,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:29:31,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654989945] [2020-10-12 10:29:31,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:29:31,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:29:31,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799843528] [2020-10-12 10:29:31,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:29:31,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:29:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:29:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:29:31,444 INFO L87 Difference]: Start difference. First operand 890 states and 1184 transitions. Second operand 22 states. [2020-10-12 10:29:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:29:36,280 INFO L93 Difference]: Finished difference Result 1661 states and 2214 transitions. [2020-10-12 10:29:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 10:29:36,281 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-12 10:29:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:29:36,291 INFO L225 Difference]: With dead ends: 1661 [2020-10-12 10:29:36,291 INFO L226 Difference]: Without dead ends: 1659 [2020-10-12 10:29:36,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=647, Invalid=4323, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 10:29:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2020-10-12 10:29:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 913. [2020-10-12 10:29:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-10-12 10:29:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1215 transitions. [2020-10-12 10:29:36,480 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1215 transitions. Word has length 70 [2020-10-12 10:29:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:29:36,481 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 1215 transitions. [2020-10-12 10:29:36,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:29:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1215 transitions. [2020-10-12 10:29:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:29:36,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:29:36,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:29:36,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:29:36,483 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:29:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:29:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash 444249148, now seen corresponding path program 24 times [2020-10-12 10:29:36,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:29:36,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864336938] [2020-10-12 10:29:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:29:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:36,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:39,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:41,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:29:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:29:41,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:41,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:29:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:41,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:41,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:29:41,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:41,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:29:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:41,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:41,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:41,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:41,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:29:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:41,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:41,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:41,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:41,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:41,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:41,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:41,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:41,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:41,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:41,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:41,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:29:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:41,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:29:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:41,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:29:41,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:42,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:29:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:42,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:42,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:42,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:42,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:29:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:29:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 10:29:42,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864336938] [2020-10-12 10:29:42,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:29:42,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:29:42,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883101538] [2020-10-12 10:29:42,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:29:42,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:29:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:29:42,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:29:42,049 INFO L87 Difference]: Start difference. First operand 913 states and 1215 transitions. Second operand 18 states. [2020-10-12 10:29:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:29:43,935 INFO L93 Difference]: Finished difference Result 1161 states and 1547 transitions. [2020-10-12 10:29:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:29:43,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 10:29:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:29:43,942 INFO L225 Difference]: With dead ends: 1161 [2020-10-12 10:29:43,943 INFO L226 Difference]: Without dead ends: 1076 [2020-10-12 10:29:43,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:29:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2020-10-12 10:29:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 939. [2020-10-12 10:29:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 939 states. [2020-10-12 10:29:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1248 transitions. [2020-10-12 10:29:44,164 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1248 transitions. Word has length 70 [2020-10-12 10:29:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:29:44,164 INFO L479 AbstractCegarLoop]: Abstraction has 939 states and 1248 transitions. [2020-10-12 10:29:44,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:29:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1248 transitions. [2020-10-12 10:29:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:29:44,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:29:44,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:29:44,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:29:44,167 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:29:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:29:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -566868102, now seen corresponding path program 25 times [2020-10-12 10:29:44,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:29:44,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406874028] [2020-10-12 10:29:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:29:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking...