/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:25:45,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:25:45,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:25:45,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:25:45,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:25:45,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:25:45,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:25:45,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:25:45,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:25:45,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:25:45,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:25:45,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:25:45,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:25:45,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:25:45,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:25:45,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:25:45,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:25:45,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:25:45,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:25:45,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:25:45,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:25:45,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:25:45,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:25:45,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:25:45,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:25:45,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:25:45,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:25:45,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:25:45,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:25:45,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:25:45,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:25:45,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:25:45,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:25:45,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:25:45,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:25:45,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:25:45,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:25:45,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:25:45,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:25:45,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:25:45,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:25:45,957 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 [2020-10-14 05:25:46,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:25:46,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:25:46,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:25:46,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:25:46,005 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:25:46,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:25:46,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:25:46,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:25:46,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:25:46,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:25:46,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:25:46,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:25:46,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:25:46,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:25:46,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:25:46,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:25:46,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:25:46,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:25:46,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:25:46,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:25:46,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:25:46,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:25:46,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:25:46,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:25:46,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:25:46,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:25:46,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:25:46,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:25:46,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:25:46,011 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:25:46,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:25:46,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:25:46,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:25:46,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:25:46,322 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:25:46,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-14 05:25:46,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185d9a8d4/99e6c279f85848098006f9a7fa5e7f01/FLAGfee5ba5d6 [2020-10-14 05:25:46,783 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:25:46,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-14 05:25:46,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185d9a8d4/99e6c279f85848098006f9a7fa5e7f01/FLAGfee5ba5d6 [2020-10-14 05:25:47,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/185d9a8d4/99e6c279f85848098006f9a7fa5e7f01 [2020-10-14 05:25:47,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:25:47,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:25:47,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:25:47,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:25:47,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:25:47,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47, skipping insertion in model container [2020-10-14 05:25:47,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:25:47,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:25:47,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:25:47,366 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:25:47,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:25:47,398 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:25:47,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47 WrapperNode [2020-10-14 05:25:47,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:25:47,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:25:47,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:25:47,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:25:47,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (1/1) ... [2020-10-14 05:25:47,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:25:47,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:25:47,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:25:47,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:25:47,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (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 [2020-10-14 05:25:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:25:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:25:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:25:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:25:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:25:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:25:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:25:47,755 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:25:47,755 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:25:47,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:25:47 BoogieIcfgContainer [2020-10-14 05:25:47,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:25:47,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:25:47,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:25:47,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:25:47,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:25:47" (1/3) ... [2020-10-14 05:25:47,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896af78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:25:47, skipping insertion in model container [2020-10-14 05:25:47,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:25:47" (2/3) ... [2020-10-14 05:25:47,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896af78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:25:47, skipping insertion in model container [2020-10-14 05:25:47,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:25:47" (3/3) ... [2020-10-14 05:25:47,770 INFO L109 eAbstractionObserver]: Analyzing ICFG loopv2.c [2020-10-14 05:25:47,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:25:47,790 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:25:47,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:25:47,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:25:47,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:25:47,832 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:25:47,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:25:47,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:25:47,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:25:47,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:25:47,832 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:25:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 05:25:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:25:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:47,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:47,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1292298132, now seen corresponding path program 1 times [2020-10-14 05:25:47,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:47,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772182733] [2020-10-14 05:25:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:25:48,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-14 05:25:48,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:25:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:25:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 05:25:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:48,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:48,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:25:48,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:48,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772182733] [2020-10-14 05:25:48,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:48,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:25:48,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865347494] [2020-10-14 05:25:48,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:48,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:48,493 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2020-10-14 05:25:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:48,608 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-14 05:25:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:48,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:25:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:48,620 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:25:48,620 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:25:48,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:25:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:25:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:25:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 05:25:48,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-10-14 05:25:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:48,666 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 05:25:48,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 05:25:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:25:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:48,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:48,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:25:48,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1442074197, now seen corresponding path program 1 times [2020-10-14 05:25:48,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:48,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672281931] [2020-10-14 05:25:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:25:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-14 05:25:48,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:25:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:25:48,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:48,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:48,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:48,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:48,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:48,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:48,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:48,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672281931] [2020-10-14 05:25:48,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:48,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:25:48,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500186881] [2020-10-14 05:25:48,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:48,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:48,910 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-14 05:25:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:48,957 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-14 05:25:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:48,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 05:25:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:48,958 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:25:48,959 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:25:48,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:25:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:25:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:25:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 05:25:48,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 15 [2020-10-14 05:25:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:48,966 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 05:25:48,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 05:25:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:25:48,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:48,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:48,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:25:48,968 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -654989578, now seen corresponding path program 1 times [2020-10-14 05:25:48,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:48,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461286312] [2020-10-14 05:25:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:25:49,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:49,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-14 05:25:49,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:49,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:49,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:49,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:49,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:49,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:49,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:49,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:49,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:49,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461286312] [2020-10-14 05:25:49,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:49,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:49,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928690208] [2020-10-14 05:25:49,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:49,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:49,326 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-14 05:25:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:49,393 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 05:25:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:49,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:25:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:49,394 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:25:49,395 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:25:49,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:25:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:25:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:25:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 05:25:49,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 05:25:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:49,401 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 05:25:49,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 05:25:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:25:49,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:49,402 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:49,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:25:49,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash -891366444, now seen corresponding path program 2 times [2020-10-14 05:25:49,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:49,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089302042] [2020-10-14 05:25:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:25:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 05:25:49,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:49,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:49,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:25:49,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:49,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:49,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:49,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:49,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:49,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:49,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089302042] [2020-10-14 05:25:49,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:49,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:49,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265348538] [2020-10-14 05:25:49,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:49,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:49,647 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-14 05:25:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:49,728 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-14 05:25:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:49,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:25:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:49,729 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:25:49,729 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:25:49,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:25:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:25:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:25:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-14 05:25:49,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-14 05:25:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:49,736 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-14 05:25:49,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-14 05:25:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:25:49,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:49,737 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:49,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:25:49,737 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash 370885302, now seen corresponding path program 3 times [2020-10-14 05:25:49,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:49,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775030484] [2020-10-14 05:25:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:25:49,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:49,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 05:25:49,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:49,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:49,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:49,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:49,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:49,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775030484] [2020-10-14 05:25:49,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:49,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:49,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081315845] [2020-10-14 05:25:49,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:49,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:49,958 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-10-14 05:25:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,064 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 05:25:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:50,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-14 05:25:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,065 INFO L225 Difference]: With dead ends: 26 [2020-10-14 05:25:50,065 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:25:50,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:25:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:25:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:25:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 05:25:50,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-14 05:25:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,071 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 05:25:50,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 05:25:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:25:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,072 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:25:50,073 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 845983764, now seen corresponding path program 4 times [2020-10-14 05:25:50,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530126121] [2020-10-14 05:25:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:25:50,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:25:50,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:50,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:50,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:50,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:50,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:50,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530126121] [2020-10-14 05:25:50,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:50,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:50,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941249696] [2020-10-14 05:25:50,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:50,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:50,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:50,345 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-10-14 05:25:50,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,466 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-14 05:25:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:50,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-14 05:25:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,467 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:25:50,468 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:25:50,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:25:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:25:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:25:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-14 05:25:50,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-14 05:25:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,473 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-14 05:25:50,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-14 05:25:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:25:50,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,474 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:25:50,475 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1605833098, now seen corresponding path program 5 times [2020-10-14 05:25:50,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441514390] [2020-10-14 05:25:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:25:50,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:50,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-14 05:25:50,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:50,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:50,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:50,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:50,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:50,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:50,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:50,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441514390] [2020-10-14 05:25:50,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:50,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:50,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999335675] [2020-10-14 05:25:50,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:50,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:50,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:50,795 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-14 05:25:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,941 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 05:25:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:50,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-14 05:25:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,942 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:25:50,942 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:25:50,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:25:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 05:25:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:25:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 05:25:50,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-14 05:25:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,948 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 05:25:50,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 05:25:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:50,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,949 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:25:50,950 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash -302744492, now seen corresponding path program 6 times [2020-10-14 05:25:50,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62322187] [2020-10-14 05:25:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:51,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-14 05:25:51,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:25:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:51,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62322187] [2020-10-14 05:25:51,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:51,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:51,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835314074] [2020-10-14 05:25:51,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:51,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:51,264 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2020-10-14 05:25:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:51,520 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-14 05:25:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:51,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-14 05:25:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:51,521 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:25:51,521 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:25:51,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:25:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:25:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:25:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:25:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-14 05:25:51,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-14 05:25:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:51,527 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-14 05:25:51,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-14 05:25:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:51,528 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:51,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:25:51,528 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1438296630, now seen corresponding path program 7 times [2020-10-14 05:25:51,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:51,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938636352] [2020-10-14 05:25:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:51,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:51,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 05:25:51,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:25:51,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:51,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:51,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:51,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:51,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:51,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938636352] [2020-10-14 05:25:51,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:51,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:25:51,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436330725] [2020-10-14 05:25:51,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:25:51,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:25:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:51,901 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2020-10-14 05:25:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:52,178 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 05:25:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:25:52,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-14 05:25:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:52,179 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:25:52,180 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:25:52,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:25:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:25:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:25:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:25:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 05:25:52,185 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-14 05:25:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:52,185 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 05:25:52,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:25:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 05:25:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:52,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:52,186 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:52,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:25:52,186 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:52,187 INFO L82 PathProgramCache]: Analyzing trace with hash -424003436, now seen corresponding path program 8 times [2020-10-14 05:25:52,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:52,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460779784] [2020-10-14 05:25:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:52,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-14 05:25:52,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:52,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:25:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:52,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:52,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:52,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:52,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:52,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:52,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:52,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460779784] [2020-10-14 05:25:52,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:52,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:25:52,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390110765] [2020-10-14 05:25:52,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:25:52,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:25:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:52,637 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-14 05:25:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:52,983 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-14 05:25:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:25:52,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-14 05:25:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:52,984 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:25:52,984 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:25:52,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:25:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:25:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 05:25:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:25:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-14 05:25:52,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-14 05:25:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:52,989 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-14 05:25:52,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:25:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-14 05:25:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:52,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:52,990 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:52,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:25:52,991 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1974236662, now seen corresponding path program 9 times [2020-10-14 05:25:52,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:52,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059673467] [2020-10-14 05:25:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:53,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:53,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-14 05:25:53,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:53,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:25:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:53,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:53,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:53,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:53,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:53,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:53,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:53,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:53,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059673467] [2020-10-14 05:25:53,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:53,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:25:53,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248435306] [2020-10-14 05:25:53,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:25:53,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:25:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:53,406 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-10-14 05:25:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:53,737 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 05:25:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:25:53,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-10-14 05:25:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:53,738 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:25:53,739 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:25:53,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:25:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:25:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:25:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:25:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 05:25:53,744 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-14 05:25:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:53,745 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 05:25:53,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:25:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 05:25:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:53,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:53,746 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:53,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:25:53,746 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -989731628, now seen corresponding path program 10 times [2020-10-14 05:25:53,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:53,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610854144] [2020-10-14 05:25:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:54,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-14 05:25:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:54,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:25:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:54,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:54,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:54,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:54,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:54,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:54,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:54,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:54,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:54,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:54,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:54,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610854144] [2020-10-14 05:25:54,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:54,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:25:54,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824537856] [2020-10-14 05:25:54,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:25:54,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:25:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:54,389 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-14 05:25:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:54,784 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-14 05:25:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:25:54,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-14 05:25:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:54,785 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:25:54,785 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:25:54,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:25:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:25:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 05:25:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:25:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-14 05:25:54,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-14 05:25:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:54,791 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-14 05:25:54,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:25:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-14 05:25:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:54,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:54,792 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:54,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:25:54,792 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1616531894, now seen corresponding path program 11 times [2020-10-14 05:25:54,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:54,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266718258] [2020-10-14 05:25:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:54,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:55,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:55,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:25:55,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:55,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:55,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:55,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:55,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:55,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266718258] [2020-10-14 05:25:55,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:55,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:25:55,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337978625] [2020-10-14 05:25:55,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:25:55,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:55,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:25:55,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:55,445 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2020-10-14 05:25:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:55,850 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 05:25:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:25:55,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-10-14 05:25:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:55,851 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:25:55,851 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:25:55,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:25:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:25:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:25:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:25:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 05:25:55,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-14 05:25:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:55,857 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 05:25:55,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:25:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 05:25:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:55,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:55,858 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:55,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:25:55,858 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash 806322452, now seen corresponding path program 12 times [2020-10-14 05:25:55,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:55,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500584080] [2020-10-14 05:25:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:56,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:56,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:25:56,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:56,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:56,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:56,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:56,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500584080] [2020-10-14 05:25:56,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:56,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:25:56,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383841274] [2020-10-14 05:25:56,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:25:56,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:25:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:25:56,432 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-14 05:25:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:56,867 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-14 05:25:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:25:56,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-14 05:25:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:56,868 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:25:56,868 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:25:56,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:25:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:25:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:25:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:25:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-14 05:25:56,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-14 05:25:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:56,874 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-14 05:25:56,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:25:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-14 05:25:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:56,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:56,875 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:56,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:25:56,875 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1459633526, now seen corresponding path program 13 times [2020-10-14 05:25:56,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:56,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082995026] [2020-10-14 05:25:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:57,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:57,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:57,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-14 05:25:57,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:57,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:57,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:57,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:57,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:25:57,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:57,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:57,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:57,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:57,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:57,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:57,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:57,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082995026] [2020-10-14 05:25:57,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:57,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:25:57,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444772601] [2020-10-14 05:25:57,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:25:57,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:25:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:25:57,623 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2020-10-14 05:25:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:58,120 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 05:25:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:25:58,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-10-14 05:25:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:58,121 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:25:58,121 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:25:58,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:25:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:25:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 05:25:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:25:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 05:25:58,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-14 05:25:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:58,130 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 05:25:58,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:25:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 05:25:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:58,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:58,131 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:58,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:25:58,131 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 237440340, now seen corresponding path program 14 times [2020-10-14 05:25:58,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:58,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737771516] [2020-10-14 05:25:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:58,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:58,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:58,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 05:25:58,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:58,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:25:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:25:58,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:58,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:58,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:25:58,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:58,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:58,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:58,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:58,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737771516] [2020-10-14 05:25:58,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:58,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:25:58,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948139820] [2020-10-14 05:25:58,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:25:58,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:25:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:25:58,860 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-14 05:25:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:59,426 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-14 05:25:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:25:59,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-14 05:25:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:59,427 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:25:59,427 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 05:25:59,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:25:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 05:25:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 05:25:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:25:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-14 05:25:59,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-14 05:25:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:59,434 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-14 05:25:59,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:25:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-14 05:25:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:25:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:59,435 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:59,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:25:59,435 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1004157238, now seen corresponding path program 15 times [2020-10-14 05:25:59,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:59,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624283371] [2020-10-14 05:25:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:59,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:25:59,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:59,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-14 05:25:59,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:59,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:59,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:25:59,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:59,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:25:59,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:00,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:00,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624283371] [2020-10-14 05:26:00,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:00,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:26:00,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023492466] [2020-10-14 05:26:00,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:26:00,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:26:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:00,215 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2020-10-14 05:26:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:00,815 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-14 05:26:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:26:00,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-10-14 05:26:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:00,816 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:26:00,816 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:26:00,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:26:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:26:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:26:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:26:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 05:26:00,822 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-14 05:26:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:00,822 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 05:26:00,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:26:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 05:26:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:26:00,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:00,823 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:00,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:26:00,824 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -997422700, now seen corresponding path program 16 times [2020-10-14 05:26:00,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:00,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930392727] [2020-10-14 05:26:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:01,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:26:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:01,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-14 05:26:01,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:01,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:26:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:01,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:01,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:01,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:01,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:01,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930392727] [2020-10-14 05:26:01,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:01,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:26:01,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611391610] [2020-10-14 05:26:01,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:26:01,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:26:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:01,843 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-14 05:26:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:02,480 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-14 05:26:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:26:02,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-14 05:26:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:02,481 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:26:02,481 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:26:02,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:26:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:26:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 05:26:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:26:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-14 05:26:02,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-14 05:26:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:02,488 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-14 05:26:02,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:26:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-14 05:26:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:26:02,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:02,488 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:02,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:26:02,489 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1378108662, now seen corresponding path program 17 times [2020-10-14 05:26:02,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:02,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670265862] [2020-10-14 05:26:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:02,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:03,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:26:03,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:03,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-14 05:26:03,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:03,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:03,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:26:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:26:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:03,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:03,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:03,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:03,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:03,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:03,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:03,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670265862] [2020-10-14 05:26:03,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:03,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:26:03,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597457765] [2020-10-14 05:26:03,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:26:03,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:26:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:26:03,513 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2020-10-14 05:26:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:04,232 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-14 05:26:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:26:04,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-10-14 05:26:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:04,233 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:26:04,234 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:26:04,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:26:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:26:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:26:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:26:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-14 05:26:04,240 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-14 05:26:04,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:04,241 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-14 05:26:04,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:26:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-14 05:26:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:04,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:04,242 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:04,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:26:04,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2005136852, now seen corresponding path program 18 times [2020-10-14 05:26:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:04,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817328196] [2020-10-14 05:26:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:04,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:04,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:04,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-14 05:26:04,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:04,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:04,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:26:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:26:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 05:26:05,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:05,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:05,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:05,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:05,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:05,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:05,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:05,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817328196] [2020-10-14 05:26:05,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:05,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:26:05,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759076135] [2020-10-14 05:26:05,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:26:05,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:26:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:26:05,294 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-14 05:26:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:06,088 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-14 05:26:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:26:06,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-14 05:26:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:06,089 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:26:06,090 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:26:06,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:26:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:26:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 05:26:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:26:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-14 05:26:06,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-14 05:26:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:06,098 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-14 05:26:06,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:26:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-14 05:26:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:06,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:06,099 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:06,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:26:06,099 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash -31825738, now seen corresponding path program 19 times [2020-10-14 05:26:06,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:06,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060721089] [2020-10-14 05:26:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:06,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:06,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-14 05:26:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:26:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:26:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:07,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:07,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:07,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:07,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:07,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:07,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060721089] [2020-10-14 05:26:07,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:07,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:26:07,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872355221] [2020-10-14 05:26:07,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:26:07,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:26:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:26:07,063 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2020-10-14 05:26:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:07,905 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-14 05:26:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:26:07,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-10-14 05:26:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:07,907 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:26:07,907 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:26:07,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:26:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:26:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 05:26:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:26:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-14 05:26:07,914 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-14 05:26:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:07,914 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-14 05:26:07,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:26:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-14 05:26:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:07,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:07,915 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:07,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:26:07,915 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1246843412, now seen corresponding path program 20 times [2020-10-14 05:26:07,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:07,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776010328] [2020-10-14 05:26:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:08,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:08,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:08,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-14 05:26:08,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:08,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:26:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:26:08,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:08,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:08,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:08,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776010328] [2020-10-14 05:26:08,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:08,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:26:08,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987355436] [2020-10-14 05:26:08,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:26:08,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:26:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:26:08,885 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-14 05:26:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:09,843 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-14 05:26:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:26:09,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-14 05:26:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:09,846 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:26:09,846 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:26:09,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:26:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:26:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 05:26:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:26:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-14 05:26:09,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-14 05:26:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:09,852 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-14 05:26:09,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:26:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-14 05:26:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:26:09,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:09,853 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:09,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:26:09,854 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2064085898, now seen corresponding path program 21 times [2020-10-14 05:26:09,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:09,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290746128] [2020-10-14 05:26:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:10,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:26:10,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:10,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-14 05:26:10,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:10,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:10,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:26:10,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:10,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:26:10,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:10,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:10,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290746128] [2020-10-14 05:26:10,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:10,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:26:10,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406551618] [2020-10-14 05:26:10,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:26:10,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:26:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:26:10,995 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2020-10-14 05:26:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:12,032 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-14 05:26:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:26:12,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-10-14 05:26:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:12,032 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:26:12,033 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:26:12,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=2599, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:26:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:26:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:26:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:26:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-14 05:26:12,038 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-14 05:26:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:12,038 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-14 05:26:12,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:26:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-14 05:26:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:12,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:12,039 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:12,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:26:12,039 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1623679404, now seen corresponding path program 22 times [2020-10-14 05:26:12,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:12,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035514317] [2020-10-14 05:26:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:26:12,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:12,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:26:12,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:13,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:13,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035514317] [2020-10-14 05:26:13,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:13,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:26:13,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143632069] [2020-10-14 05:26:13,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:26:13,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:26:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:26:13,222 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2020-10-14 05:26:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:14,316 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-14 05:26:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:26:14,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-14 05:26:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:14,317 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:26:14,317 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:26:14,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=2807, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:26:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:26:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 05:26:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:26:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-14 05:26:14,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-14 05:26:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:14,325 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-14 05:26:14,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:26:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-14 05:26:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:26:14,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:14,325 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:14,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:26:14,326 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -855979978, now seen corresponding path program 23 times [2020-10-14 05:26:14,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:14,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610429241] [2020-10-14 05:26:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:14,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:26:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:26:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:15,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:15,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:15,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610429241] [2020-10-14 05:26:15,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:15,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:26:15,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765173631] [2020-10-14 05:26:15,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:26:15,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:26:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:26:15,560 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2020-10-14 05:26:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:16,722 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-14 05:26:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:26:16,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-14 05:26:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:16,723 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:26:16,724 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:26:16,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=3023, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:26:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:26:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 05:26:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:26:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-14 05:26:16,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-14 05:26:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:16,730 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-14 05:26:16,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:26:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-14 05:26:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:26:16,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:16,731 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:16,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:26:16,732 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1467865748, now seen corresponding path program 24 times [2020-10-14 05:26:16,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:16,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185058425] [2020-10-14 05:26:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:17,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:26:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:26:17,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:17,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:17,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185058425] [2020-10-14 05:26:17,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:17,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:26:17,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902531614] [2020-10-14 05:26:17,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:26:17,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:26:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:26:17,977 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2020-10-14 05:26:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:19,204 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-14 05:26:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:26:19,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-10-14 05:26:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:19,205 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:26:19,205 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:26:19,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=3247, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:26:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:26:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 05:26:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:26:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-14 05:26:19,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-14 05:26:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:19,211 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-14 05:26:19,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:26:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-14 05:26:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:26:19,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:19,211 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:19,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:26:19,211 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 492639222, now seen corresponding path program 25 times [2020-10-14 05:26:19,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:19,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478785382] [2020-10-14 05:26:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:19,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:19,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:19,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:26:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:19,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:26:19,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:20,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:20,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:20,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:20,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:20,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:20,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:20,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478785382] [2020-10-14 05:26:20,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:20,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:26:20,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887442314] [2020-10-14 05:26:20,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:26:20,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:26:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:26:20,406 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2020-10-14 05:26:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:21,700 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-14 05:26:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:26:21,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-10-14 05:26:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:21,701 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:26:21,701 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:26:21,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=181, Invalid=3479, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:26:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:26:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:26:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:26:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-14 05:26:21,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-14 05:26:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:21,713 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-14 05:26:21,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:26:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-14 05:26:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:21,714 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:21,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:26:21,714 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash 325387988, now seen corresponding path program 26 times [2020-10-14 05:26:21,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:21,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688811177] [2020-10-14 05:26:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:21,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:26:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:26:22,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:23,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:23,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:23,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688811177] [2020-10-14 05:26:23,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:23,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:26:23,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618838095] [2020-10-14 05:26:23,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:26:23,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:26:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:26:23,074 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2020-10-14 05:26:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:24,686 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-14 05:26:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:26:24,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-14 05:26:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:24,688 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:26:24,688 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:26:24,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=187, Invalid=3719, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:26:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:26:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-14 05:26:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:26:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-14 05:26:24,694 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-14 05:26:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:24,694 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-14 05:26:24,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:26:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-14 05:26:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:24,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:24,695 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:24,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:26:24,696 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash -564432970, now seen corresponding path program 27 times [2020-10-14 05:26:24,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:24,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342405053] [2020-10-14 05:26:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:24,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:25,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:25,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-14 05:26:25,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:25,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:26:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:26:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:26,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:26,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:26,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:26:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:26,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342405053] [2020-10-14 05:26:26,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:26,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:26:26,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477353459] [2020-10-14 05:26:26,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:26:26,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:26:26,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:26:26,515 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2020-10-14 05:26:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:27,974 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-14 05:26:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:26:27,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-10-14 05:26:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:27,976 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:26:27,976 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:26:27,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=3967, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 05:26:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:26:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 05:26:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:26:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-14 05:26:27,981 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-14 05:26:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:27,982 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-14 05:26:27,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:26:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-14 05:26:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:26:27,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:27,982 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:27,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:26:27,983 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1915888404, now seen corresponding path program 28 times [2020-10-14 05:26:27,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:27,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740249720] [2020-10-14 05:26:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:28,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:26:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:26:28,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:29,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:29,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:29,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740249720] [2020-10-14 05:26:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:26:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838315782] [2020-10-14 05:26:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:26:29,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:26:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:26:29,239 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2020-10-14 05:26:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:30,790 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-14 05:26:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:26:30,791 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2020-10-14 05:26:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:30,791 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:26:30,792 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:26:30,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=4223, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 05:26:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:26:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-14 05:26:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:26:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-14 05:26:30,797 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-14 05:26:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:30,798 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-14 05:26:30,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:26:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-14 05:26:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:26:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:30,799 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:30,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:26:30,799 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1496439670, now seen corresponding path program 29 times [2020-10-14 05:26:30,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:30,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409051914] [2020-10-14 05:26:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:31,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:26:31,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:31,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-14 05:26:31,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:31,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:26:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:26:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:32,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409051914] [2020-10-14 05:26:32,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:32,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:26:32,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540830252] [2020-10-14 05:26:32,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:26:32,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:32,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:26:32,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:26:32,148 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2020-10-14 05:26:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:33,820 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-14 05:26:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:26:33,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-10-14 05:26:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:33,822 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:26:33,822 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 05:26:33,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=205, Invalid=4487, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:26:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 05:26:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 05:26:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:26:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-14 05:26:33,826 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-14 05:26:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:33,827 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-14 05:26:33,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:26:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-14 05:26:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:26:33,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:33,828 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:33,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:26:33,828 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1378430804, now seen corresponding path program 30 times [2020-10-14 05:26:33,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:33,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306711941] [2020-10-14 05:26:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:34,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:34,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:26:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:34,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:26:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:35,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:35,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306711941] [2020-10-14 05:26:35,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:35,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:26:35,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307001926] [2020-10-14 05:26:35,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:26:35,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:26:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:26:35,917 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2020-10-14 05:26:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:37,662 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-14 05:26:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:26:37,662 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-14 05:26:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:37,663 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:26:37,663 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:26:37,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=211, Invalid=4759, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:26:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:26:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 05:26:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:26:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-14 05:26:37,670 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-14 05:26:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:37,671 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-14 05:26:37,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:26:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-14 05:26:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:26:37,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:37,671 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:37,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:26:37,672 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2015123254, now seen corresponding path program 31 times [2020-10-14 05:26:37,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:37,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394928733] [2020-10-14 05:26:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:38,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:26:38,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:38,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:26:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:40,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:40,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:40,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:40,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:40,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394928733] [2020-10-14 05:26:40,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:40,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:26:40,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732563547] [2020-10-14 05:26:40,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:26:40,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:26:40,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:26:40,103 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2020-10-14 05:26:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:41,996 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-14 05:26:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:26:41,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2020-10-14 05:26:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:41,998 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:26:41,998 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:26:41,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=217, Invalid=5039, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:26:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:26:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 05:26:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:26:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-14 05:26:42,003 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-14 05:26:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:42,003 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-14 05:26:42,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:26:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-14 05:26:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:26:42,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:42,004 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:42,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:26:42,004 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash 277752724, now seen corresponding path program 32 times [2020-10-14 05:26:42,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:42,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102361128] [2020-10-14 05:26:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:42,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:26:42,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:42,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:26:42,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:43,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:43,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:43,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:43,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:43,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102361128] [2020-10-14 05:26:43,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:43,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:26:43,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536706610] [2020-10-14 05:26:43,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:26:43,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:26:43,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:26:43,947 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2020-10-14 05:26:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:45,893 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-14 05:26:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:26:45,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-14 05:26:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:45,895 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:26:45,895 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:26:45,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=223, Invalid=5327, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 05:26:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:26:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-14 05:26:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:26:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-14 05:26:45,900 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-14 05:26:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:45,900 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-14 05:26:45,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:26:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-14 05:26:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:26:45,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:45,901 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:45,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:26:45,902 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2041126154, now seen corresponding path program 33 times [2020-10-14 05:26:45,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:45,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091389402] [2020-10-14 05:26:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:47,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:47,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:26:47,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-14 05:26:47,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:47,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:26:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:26:47,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:48,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:48,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:48,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:48,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091389402] [2020-10-14 05:26:48,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:48,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:26:48,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884511073] [2020-10-14 05:26:48,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:26:48,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:48,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:26:48,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:26:48,276 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2020-10-14 05:26:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:50,323 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-14 05:26:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:26:50,323 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2020-10-14 05:26:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:50,324 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:26:50,325 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:26:50,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=229, Invalid=5623, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 05:26:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:26:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 05:26:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:26:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-14 05:26:50,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-14 05:26:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:50,329 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-14 05:26:50,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:26:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-14 05:26:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:26:50,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:50,330 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:50,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:26:50,331 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash -911927340, now seen corresponding path program 34 times [2020-10-14 05:26:50,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:50,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345100605] [2020-10-14 05:26:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:51,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:51,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:26:51,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:26:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:52,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:52,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:52,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:52,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:52,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:52,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:52,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:52,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345100605] [2020-10-14 05:26:52,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:52,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:26:52,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484270422] [2020-10-14 05:26:52,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:26:52,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:52,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:26:52,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:26:52,804 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2020-10-14 05:26:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:54,969 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-14 05:26:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:26:54,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-14 05:26:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:54,970 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:26:54,970 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:26:54,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=235, Invalid=5927, Unknown=0, NotChecked=0, Total=6162 [2020-10-14 05:26:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:26:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 05:26:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:26:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-14 05:26:54,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-14 05:26:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:54,975 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-14 05:26:54,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:26:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-14 05:26:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:26:54,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:54,976 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:54,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:26:54,976 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash -266502474, now seen corresponding path program 35 times [2020-10-14 05:26:54,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:54,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848939385] [2020-10-14 05:26:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:55,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:55,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:26:55,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:55,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:26:55,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:56,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:56,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:56,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:56,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848939385] [2020-10-14 05:26:56,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:56,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 05:26:56,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845828203] [2020-10-14 05:26:56,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 05:26:56,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:56,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 05:26:56,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:26:56,861 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2020-10-14 05:26:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:59,170 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-14 05:26:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 05:26:59,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2020-10-14 05:26:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:59,172 INFO L225 Difference]: With dead ends: 58 [2020-10-14 05:26:59,172 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:26:59,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=241, Invalid=6239, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 05:26:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:26:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 05:26:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:26:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-14 05:26:59,178 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-14 05:26:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:59,178 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-14 05:26:59,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 05:26:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-14 05:26:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:26:59,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:59,179 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:59,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:26:59,179 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1733168108, now seen corresponding path program 36 times [2020-10-14 05:26:59,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:59,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428699831] [2020-10-14 05:26:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:00,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:27:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:27:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:02,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:02,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:02,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428699831] [2020-10-14 05:27:02,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:02,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 05:27:02,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573273260] [2020-10-14 05:27:02,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 05:27:02,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 05:27:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:27:02,298 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2020-10-14 05:27:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:04,712 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-14 05:27:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:27:04,712 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2020-10-14 05:27:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:04,713 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:27:04,713 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:27:04,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=247, Invalid=6559, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 05:27:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:27:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 05:27:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:27:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-14 05:27:04,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-14 05:27:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:04,717 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-14 05:27:04,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 05:27:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-14 05:27:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:27:04,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:04,718 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:04,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:27:04,718 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 44837494, now seen corresponding path program 37 times [2020-10-14 05:27:04,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:04,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871389420] [2020-10-14 05:27:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:05,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:27:05,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:05,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-14 05:27:05,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:05,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 05:27:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:27:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:07,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:07,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:07,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:07,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871389420] [2020-10-14 05:27:07,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:07,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 05:27:07,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096040533] [2020-10-14 05:27:07,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 05:27:07,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 05:27:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:27:07,156 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2020-10-14 05:27:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:09,664 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-14 05:27:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:27:09,665 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2020-10-14 05:27:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:09,666 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:27:09,666 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:27:09,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=253, Invalid=6887, Unknown=0, NotChecked=0, Total=7140 [2020-10-14 05:27:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:27:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 05:27:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:27:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-14 05:27:09,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-14 05:27:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:09,672 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-14 05:27:09,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 05:27:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-14 05:27:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:27:09,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:09,673 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:09,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:27:09,673 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash -671563692, now seen corresponding path program 38 times [2020-10-14 05:27:09,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:09,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728037537] [2020-10-14 05:27:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:27:10,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:10,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:27:10,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:12,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:12,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:12,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:12,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:12,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728037537] [2020-10-14 05:27:12,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:12,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 05:27:12,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836013865] [2020-10-14 05:27:12,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 05:27:12,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 05:27:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:27:12,056 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2020-10-14 05:27:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:14,747 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-14 05:27:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 05:27:14,747 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-14 05:27:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:14,748 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:27:14,748 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:27:14,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=259, Invalid=7223, Unknown=0, NotChecked=0, Total=7482 [2020-10-14 05:27:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:27:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 05:27:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:27:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-14 05:27:14,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-14 05:27:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:14,752 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-14 05:27:14,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 05:27:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-14 05:27:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:27:14,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:14,753 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:14,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:27:14,753 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1405163978, now seen corresponding path program 39 times [2020-10-14 05:27:14,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:14,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852854848] [2020-10-14 05:27:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:15,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:16,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:16,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:27:16,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1408 [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:27:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:17,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:17,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:17,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:17,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:17,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:17,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:17,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:17,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:17,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852854848] [2020-10-14 05:27:17,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 05:27:17,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932520623] [2020-10-14 05:27:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 05:27:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 05:27:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:27:17,575 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2020-10-14 05:27:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:20,338 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-14 05:27:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 05:27:20,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-10-14 05:27:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:20,339 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:27:20,340 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:27:20,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=265, Invalid=7567, Unknown=0, NotChecked=0, Total=7832 [2020-10-14 05:27:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:27:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 05:27:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:27:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-14 05:27:20,345 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-14 05:27:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:20,345 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-14 05:27:20,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 05:27:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-14 05:27:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:27:20,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:20,346 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:20,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:27:20,346 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1623030932, now seen corresponding path program 40 times [2020-10-14 05:27:20,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:20,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50625680] [2020-10-14 05:27:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:21,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 05:27:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:27:21,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:23,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:23,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:23,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:23,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:23,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:23,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:23,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50625680] [2020-10-14 05:27:23,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:23,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 05:27:23,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517243278] [2020-10-14 05:27:23,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 05:27:23,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 05:27:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:27:23,172 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2020-10-14 05:27:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:26,152 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-14 05:27:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:27:26,152 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2020-10-14 05:27:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:26,153 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:27:26,153 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:27:26,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=271, Invalid=7919, Unknown=0, NotChecked=0, Total=8190 [2020-10-14 05:27:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:27:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-14 05:27:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:27:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-14 05:27:26,157 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-14 05:27:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:26,158 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-14 05:27:26,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 05:27:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-14 05:27:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 05:27:26,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:26,159 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:26,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:27:26,159 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:26,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1007792630, now seen corresponding path program 41 times [2020-10-14 05:27:26,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:26,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277144419] [2020-10-14 05:27:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:27,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:27,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:27:27,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1610 [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:27:27,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:29,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:29,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:29,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:29,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:29,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277144419] [2020-10-14 05:27:29,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:29,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 05:27:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981591619] [2020-10-14 05:27:29,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 05:27:29,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 05:27:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:27:29,357 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2020-10-14 05:27:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:32,367 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-14 05:27:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:27:32,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2020-10-14 05:27:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:32,369 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:27:32,369 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:27:32,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=277, Invalid=8279, Unknown=0, NotChecked=0, Total=8556 [2020-10-14 05:27:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:27:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:27:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:27:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-14 05:27:32,374 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-14 05:27:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:32,374 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-14 05:27:32,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 05:27:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-14 05:27:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:27:32,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:32,375 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:32,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:27:32,376 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash -884725548, now seen corresponding path program 42 times [2020-10-14 05:27:32,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:32,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854731162] [2020-10-14 05:27:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:33,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 05:27:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:27:33,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:35,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:35,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:35,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:35,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854731162] [2020-10-14 05:27:35,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:35,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 05:27:35,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882795987] [2020-10-14 05:27:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 05:27:35,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 05:27:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:27:35,498 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2020-10-14 05:27:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:38,721 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-14 05:27:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:27:38,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-14 05:27:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:38,722 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:27:38,722 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 05:27:38,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=283, Invalid=8647, Unknown=0, NotChecked=0, Total=8930 [2020-10-14 05:27:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 05:27:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 05:27:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:27:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-14 05:27:38,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-14 05:27:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:38,726 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-14 05:27:38,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 05:27:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-14 05:27:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:27:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:38,727 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:38,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:27:38,727 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 576753078, now seen corresponding path program 43 times [2020-10-14 05:27:38,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:38,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444532538] [2020-10-14 05:27:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:40,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 05:27:40,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:40,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:27:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:42,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:42,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:42,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:42,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:42,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:42,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:42,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:42,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444532538] [2020-10-14 05:27:42,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:42,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 05:27:42,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851847994] [2020-10-14 05:27:42,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 05:27:42,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 05:27:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:27:42,190 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2020-10-14 05:27:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:45,465 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-14 05:27:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 05:27:45,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2020-10-14 05:27:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:45,467 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:27:45,467 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:27:45,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=289, Invalid=9023, Unknown=0, NotChecked=0, Total=9312 [2020-10-14 05:27:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:27:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 05:27:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:27:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-14 05:27:45,471 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-14 05:27:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:45,472 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-14 05:27:45,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 05:27:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-14 05:27:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:27:45,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:45,475 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:45,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:27:45,475 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1362049772, now seen corresponding path program 44 times [2020-10-14 05:27:45,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:45,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743922902] [2020-10-14 05:27:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:45,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:46,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:27:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-14 05:27:46,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:46,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 05:27:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:27:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:48,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:48,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743922902] [2020-10-14 05:27:48,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:48,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 05:27:48,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109038693] [2020-10-14 05:27:48,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 05:27:48,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:48,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 05:27:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:27:48,656 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2020-10-14 05:27:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:52,064 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-14 05:27:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 05:27:52,064 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2020-10-14 05:27:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:52,065 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:27:52,065 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:27:52,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=295, Invalid=9407, Unknown=0, NotChecked=0, Total=9702 [2020-10-14 05:27:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:27:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-14 05:27:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 05:27:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-14 05:27:52,069 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-14 05:27:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:52,069 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-14 05:27:52,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 05:27:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-14 05:27:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 05:27:52,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:52,070 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:52,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:27:52,070 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1335395978, now seen corresponding path program 45 times [2020-10-14 05:27:52,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:52,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376257338] [2020-10-14 05:27:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:52,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 05:27:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:27:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:27:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:55,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:55,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:55,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:27:55,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:55,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376257338] [2020-10-14 05:27:55,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:55,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 05:27:55,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232137631] [2020-10-14 05:27:55,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 05:27:55,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 05:27:55,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:27:55,611 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2020-10-14 05:27:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:59,193 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-14 05:27:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 05:27:59,193 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2020-10-14 05:27:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:59,194 INFO L225 Difference]: With dead ends: 68 [2020-10-14 05:27:59,195 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:27:59,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=301, Invalid=9799, Unknown=0, NotChecked=0, Total=10100 [2020-10-14 05:27:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:27:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:27:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:27:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-14 05:27:59,200 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-14 05:27:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:59,200 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-14 05:27:59,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 05:27:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-14 05:27:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:27:59,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:59,201 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:59,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:27:59,201 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash -509128364, now seen corresponding path program 46 times [2020-10-14 05:27:59,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:59,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377662342] [2020-10-14 05:27:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:00,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:01,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:01,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2603 [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 05:28:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:28:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:03,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:03,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:03,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:03,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:03,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:03,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:03,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:03,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:03,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:03,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377662342] [2020-10-14 05:28:03,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:03,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 05:28:03,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189634983] [2020-10-14 05:28:03,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 05:28:03,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 05:28:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:28:03,747 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2020-10-14 05:28:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:07,513 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-14 05:28:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:28:07,513 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-14 05:28:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:07,514 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:28:07,514 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:28:07,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=307, Invalid=10199, Unknown=0, NotChecked=0, Total=10506 [2020-10-14 05:28:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:28:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 05:28:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:28:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-14 05:28:07,520 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-14 05:28:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:07,520 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-14 05:28:07,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 05:28:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-14 05:28:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 05:28:07,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:07,520 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:07,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:28:07,521 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash -664636106, now seen corresponding path program 47 times [2020-10-14 05:28:07,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:07,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750186284] [2020-10-14 05:28:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:07,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:08,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:09,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:09,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 05:28:09,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:09,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:28:09,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:11,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:11,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:11,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:11,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:11,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750186284] [2020-10-14 05:28:11,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:11,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 05:28:11,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870341211] [2020-10-14 05:28:11,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 05:28:11,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 05:28:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:28:11,223 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2020-10-14 05:28:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:15,087 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-14 05:28:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 05:28:15,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2020-10-14 05:28:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:15,089 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:28:15,089 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:28:15,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=313, Invalid=10607, Unknown=0, NotChecked=0, Total=10920 [2020-10-14 05:28:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:28:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 05:28:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:28:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-14 05:28:15,095 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-14 05:28:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:15,095 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-14 05:28:15,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 05:28:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-14 05:28:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:28:15,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:15,096 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:15,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:28:15,096 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1190408812, now seen corresponding path program 48 times [2020-10-14 05:28:15,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:15,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453050792] [2020-10-14 05:28:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:17,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:17,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:28:17,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:17,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2402 [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:28:17,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:19,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:19,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:19,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:19,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:19,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:19,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453050792] [2020-10-14 05:28:19,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:19,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 05:28:19,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159927125] [2020-10-14 05:28:19,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 05:28:19,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 05:28:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:28:19,633 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2020-10-14 05:28:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:23,593 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-14 05:28:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 05:28:23,594 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2020-10-14 05:28:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:23,595 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:28:23,595 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:28:23,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=319, Invalid=11023, Unknown=0, NotChecked=0, Total=11342 [2020-10-14 05:28:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:28:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-14 05:28:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:28:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-14 05:28:23,602 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-10-14 05:28:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:23,602 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-14 05:28:23,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 05:28:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-14 05:28:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:28:23,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:23,603 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:23,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:28:23,603 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:23,604 INFO L82 PathProgramCache]: Analyzing trace with hash -309493514, now seen corresponding path program 49 times [2020-10-14 05:28:23,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:23,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891204261] [2020-10-14 05:28:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:23,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:25,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:25,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 05:28:25,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:25,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-14 05:28:25,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:25,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 05:28:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:28:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:27,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:27,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:27,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:27,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891204261] [2020-10-14 05:28:27,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:27,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 05:28:27,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967344574] [2020-10-14 05:28:27,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 05:28:27,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:27,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 05:28:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:28:27,951 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2020-10-14 05:28:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:32,015 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-14 05:28:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 05:28:32,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-10-14 05:28:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:32,017 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:28:32,017 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:28:32,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=325, Invalid=11447, Unknown=0, NotChecked=0, Total=11772 [2020-10-14 05:28:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:28:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:28:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:28:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-14 05:28:32,022 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-10-14 05:28:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:32,022 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-14 05:28:32,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 05:28:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-14 05:28:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:28:32,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:32,023 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:32,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:28:32,023 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1229076948, now seen corresponding path program 50 times [2020-10-14 05:28:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:32,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566351006] [2020-10-14 05:28:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:33,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:28:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-14 05:28:33,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:33,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 05:28:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:28:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:35,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:35,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:35,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:35,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:35,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566351006] [2020-10-14 05:28:35,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:35,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 05:28:35,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750384988] [2020-10-14 05:28:35,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 05:28:35,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 05:28:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:28:35,814 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2020-10-14 05:28:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:39,994 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-14 05:28:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 05:28:39,995 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-14 05:28:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:39,997 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:28:39,997 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:28:39,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=331, Invalid=11879, Unknown=0, NotChecked=0, Total=12210 [2020-10-14 05:28:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:28:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-14 05:28:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:28:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-14 05:28:40,002 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-10-14 05:28:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:40,003 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-14 05:28:40,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 05:28:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-14 05:28:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 05:28:40,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:40,004 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:40,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:28:40,004 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1680121014, now seen corresponding path program 51 times [2020-10-14 05:28:40,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:40,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127469650] [2020-10-14 05:28:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 05:28:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:28:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:43,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:43,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:43,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:43,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:43,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127469650] [2020-10-14 05:28:43,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:43,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 05:28:43,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361003881] [2020-10-14 05:28:43,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 05:28:43,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 05:28:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:28:43,974 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2020-10-14 05:28:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:48,381 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-14 05:28:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 05:28:48,384 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2020-10-14 05:28:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:48,385 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:28:48,386 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:28:48,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=337, Invalid=12319, Unknown=0, NotChecked=0, Total=12656 [2020-10-14 05:28:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:28:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:28:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:28:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-14 05:28:48,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-10-14 05:28:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:48,393 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-14 05:28:48,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 05:28:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-14 05:28:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:28:48,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:48,394 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:48,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:28:48,395 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1517382124, now seen corresponding path program 52 times [2020-10-14 05:28:48,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:48,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544919959] [2020-10-14 05:28:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:50,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:50,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 05:28:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:28:50,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:28:52,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:52,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544919959] [2020-10-14 05:28:52,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:52,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 05:28:52,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740177565] [2020-10-14 05:28:52,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 05:28:52,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 05:28:52,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:28:52,572 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2020-10-14 05:28:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:57,145 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-14 05:28:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 05:28:57,146 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2020-10-14 05:28:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:57,146 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:28:57,146 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:28:57,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=343, Invalid=12767, Unknown=0, NotChecked=0, Total=13110 [2020-10-14 05:28:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:28:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-14 05:28:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:28:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-14 05:28:57,151 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-10-14 05:28:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:57,152 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-14 05:28:57,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 05:28:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-14 05:28:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:28:57,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:57,153 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:57,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:28:57,153 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1855731594, now seen corresponding path program 53 times [2020-10-14 05:28:57,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:57,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845638746] [2020-10-14 05:28:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:58,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:59,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:59,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:28:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:01,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:01,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:01,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:29:01,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:01,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:01,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:01,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845638746] [2020-10-14 05:29:01,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:01,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 05:29:01,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186666883] [2020-10-14 05:29:01,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 05:29:01,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 05:29:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:29:01,857 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2020-10-14 05:29:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:06,585 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-14 05:29:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 05:29:06,585 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2020-10-14 05:29:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:06,586 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:29:06,586 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:29:06,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=349, Invalid=13223, Unknown=0, NotChecked=0, Total=13572 [2020-10-14 05:29:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:29:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-14 05:29:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:29:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-14 05:29:06,593 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-10-14 05:29:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:06,593 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-14 05:29:06,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 05:29:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-14 05:29:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:29:06,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:06,594 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:06,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:29:06,594 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash 540336724, now seen corresponding path program 54 times [2020-10-14 05:29:06,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:06,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61044195] [2020-10-14 05:29:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3574 [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 05:29:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:29:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:12,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:12,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:12,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:12,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61044195] [2020-10-14 05:29:12,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:12,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 05:29:12,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172250254] [2020-10-14 05:29:12,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 05:29:12,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 05:29:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:29:12,869 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2020-10-14 05:29:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:17,877 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-14 05:29:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 05:29:17,878 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2020-10-14 05:29:17,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:17,879 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:29:17,879 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:29:17,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=355, Invalid=13687, Unknown=0, NotChecked=0, Total=14042 [2020-10-14 05:29:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:29:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 05:29:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:29:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-14 05:29:17,885 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-10-14 05:29:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:17,885 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-14 05:29:17,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 05:29:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-14 05:29:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 05:29:17,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:17,886 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:17,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:29:17,887 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1804010550, now seen corresponding path program 55 times [2020-10-14 05:29:17,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:17,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592215984] [2020-10-14 05:29:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:17,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3360 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:29:21,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:29:24,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:24,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:24,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592215984] [2020-10-14 05:29:24,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:24,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 05:29:24,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097220417] [2020-10-14 05:29:24,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 05:29:24,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:24,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 05:29:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:29:24,041 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2020-10-14 05:29:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:29,164 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-14 05:29:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 05:29:29,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2020-10-14 05:29:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:29,166 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:29:29,166 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:29:29,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=361, Invalid=14159, Unknown=0, NotChecked=0, Total=14520 [2020-10-14 05:29:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:29:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 05:29:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:29:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-14 05:29:29,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-10-14 05:29:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:29,171 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-14 05:29:29,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 05:29:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-14 05:29:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:29:29,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:29,172 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:29,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:29:29,172 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1971773804, now seen corresponding path program 56 times [2020-10-14 05:29:29,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:29,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751504185] [2020-10-14 05:29:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:31,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:31,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:31,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:29:31,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:31,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2510 [2020-10-14 05:29:31,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:31,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 05:29:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:29:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:34,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:34,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:34,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:34,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:34,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751504185] [2020-10-14 05:29:34,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:34,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 05:29:34,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680360259] [2020-10-14 05:29:34,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 05:29:34,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 05:29:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:29:34,554 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states.