/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:52:36,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:52:36,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:52:36,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:52:36,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:52:36,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:52:36,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:52:36,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:52:36,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:52:36,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:52:36,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:52:36,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:52:36,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:52:36,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:52:36,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:52:36,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:52:36,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:52:36,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:52:36,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:52:36,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:52:36,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:52:36,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:52:36,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:52:36,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:52:36,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:52:36,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:52:36,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:52:36,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:52:36,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:52:36,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:52:36,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:52:36,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:52:36,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:52:36,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:52:36,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:52:36,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:52:36,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:52:36,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:52:36,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:52:36,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:52:36,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:52:36,907 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 23:52:36,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:52:36,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:52:36,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:52:36,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:52:36,941 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:52:36,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:52:36,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:52:36,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:52:36,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:52:36,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:52:36,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:52:36,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:52:36,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:52:36,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:52:36,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:52:36,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:52:36,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:52:36,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:52:36,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:52:36,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:52:36,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:52:36,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:52:36,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:52:36,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:52:36,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:52:36,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:52:36,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:52:36,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:52:36,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:52:36,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:52:37,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:52:37,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:52:37,272 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:52:37,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:52:37,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:52:37,275 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-14 23:52:37,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ca84c8d/6c540a8d44624004a37dd55358dd0a1a/FLAGbbaab34cb [2020-10-14 23:52:37,735 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:52:37,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-14 23:52:37,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ca84c8d/6c540a8d44624004a37dd55358dd0a1a/FLAGbbaab34cb [2020-10-14 23:52:38,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ca84c8d/6c540a8d44624004a37dd55358dd0a1a [2020-10-14 23:52:38,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:52:38,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:52:38,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:52:38,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:52:38,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:52:38,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbadd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38, skipping insertion in model container [2020-10-14 23:52:38,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:52:38,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:52:38,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:52:38,351 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:52:38,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:52:38,383 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:52:38,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38 WrapperNode [2020-10-14 23:52:38,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:52:38,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:52:38,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:52:38,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:52:38,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (1/1) ... [2020-10-14 23:52:38,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:52:38,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:52:38,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:52:38,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:52:38,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (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 23:52:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:52:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:52:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 23:52:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:52:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:52:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:52:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:52:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 23:52:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:52:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:52:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:52:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:52:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:52:38,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:52:38,774 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:52:38,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:38 BoogieIcfgContainer [2020-10-14 23:52:38,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:52:38,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:52:38,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:52:38,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:52:38,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:52:38" (1/3) ... [2020-10-14 23:52:38,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9bbb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:38, skipping insertion in model container [2020-10-14 23:52:38,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:38" (2/3) ... [2020-10-14 23:52:38,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9bbb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:38, skipping insertion in model container [2020-10-14 23:52:38,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:38" (3/3) ... [2020-10-14 23:52:38,788 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-14 23:52:38,798 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:52:38,806 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:52:38,821 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:52:38,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:52:38,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:52:38,846 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:52:38,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:52:38,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:52:38,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:52:38,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:52:38,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:52:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 23:52:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:52:38,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:38,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:38,878 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash -516899263, now seen corresponding path program 1 times [2020-10-14 23:52:38,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:38,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78251960] [2020-10-14 23:52:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:38,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:38,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:39,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:52:39,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:52:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-14 23:52:39,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:39,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:52:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:52:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:52:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:52:39,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:39,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:39,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:39,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:52:39,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:39,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:39,234 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 23:52:39,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78251960] [2020-10-14 23:52:39,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:39,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:52:39,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670065755] [2020-10-14 23:52:39,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:52:39,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:39,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:52:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:52:39,264 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-14 23:52:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:39,386 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-10-14 23:52:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:52:39,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:52:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:39,403 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:52:39,403 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:52:39,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:52:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-14 23:52:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:52:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 23:52:39,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-10-14 23:52:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:39,502 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 23:52:39,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:52:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 23:52:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:52:39,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:39,504 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:39,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:52:39,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2007463969, now seen corresponding path program 1 times [2020-10-14 23:52:39,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:39,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342694055] [2020-10-14 23:52:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:39,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:39,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:52:39,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:39,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-14 23:52:39,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:39,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:52:39,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:39,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:52:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:52:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:39,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:39,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:39,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:39,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:39,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:39,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:39,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:39,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342694055] [2020-10-14 23:52:39,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:39,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:52:39,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107370066] [2020-10-14 23:52:39,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:52:39,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:39,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:52:39,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:39,929 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-14 23:52:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:40,005 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-14 23:52:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:52:40,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 23:52:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:40,007 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:52:40,007 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:52:40,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:52:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:52:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-10-14 23:52:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:52:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 23:52:40,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-14 23:52:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:40,015 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 23:52:40,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:52:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 23:52:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:52:40,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:40,017 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:40,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:52:40,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 407428156, now seen corresponding path program 2 times [2020-10-14 23:52:40,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:40,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369854986] [2020-10-14 23:52:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:52:40,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 23:52:40,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:52:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:52:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:40,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,269 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 23:52:40,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369854986] [2020-10-14 23:52:40,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:40,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:52:40,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735085602] [2020-10-14 23:52:40,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:52:40,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:52:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:52:40,272 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-14 23:52:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:40,350 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-14 23:52:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:52:40,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:52:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:40,352 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:52:40,353 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:52:40,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:52:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:52:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2020-10-14 23:52:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:52:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-14 23:52:40,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-14 23:52:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-14 23:52:40,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:52:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-14 23:52:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:52:40,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:40,361 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:40,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:52:40,361 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash 371303831, now seen corresponding path program 3 times [2020-10-14 23:52:40,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:40,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506374572] [2020-10-14 23:52:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:52:40,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:40,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-14 23:52:40,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:52:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:40,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:52:40,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:40,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:40,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:40,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:40,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506374572] [2020-10-14 23:52:40,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:40,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:52:40,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529811057] [2020-10-14 23:52:40,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:52:40,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:52:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:52:40,547 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-14 23:52:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:40,617 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-14 23:52:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:52:40,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:52:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:40,620 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:52:40,620 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:52:40,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:52:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:52:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-10-14 23:52:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:52:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-14 23:52:40,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-14 23:52:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:40,627 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-14 23:52:40,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:52:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-14 23:52:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:52:40,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:40,629 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:40,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:52:40,629 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 15565874, now seen corresponding path program 4 times [2020-10-14 23:52:40,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:40,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815846533] [2020-10-14 23:52:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:52:40,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:40,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 23:52:40,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:52:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:52:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:40,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:40,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:40,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:40,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:40,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:40,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:40,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:40,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:40,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815846533] [2020-10-14 23:52:40,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:40,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:52:40,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631685023] [2020-10-14 23:52:40,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:52:40,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:52:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:52:40,803 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-14 23:52:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:40,898 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-14 23:52:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:52:40,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:52:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:40,900 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:52:40,900 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:52:40,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:52:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:52:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 30. [2020-10-14 23:52:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:52:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 23:52:40,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-14 23:52:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:40,908 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 23:52:40,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:52:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 23:52:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:52:40,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:40,910 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:40,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:52:40,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1748772877, now seen corresponding path program 5 times [2020-10-14 23:52:40,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:40,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912758342] [2020-10-14 23:52:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:40,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:41,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:52:41,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:41,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-14 23:52:41,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:41,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:52:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:52:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:41,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:41,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:41,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:41,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:41,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:41,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912758342] [2020-10-14 23:52:41,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:41,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:52:41,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731595304] [2020-10-14 23:52:41,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:52:41,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:52:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:52:41,191 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-14 23:52:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:41,295 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-14 23:52:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:52:41,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:52:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:41,297 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:52:41,297 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 23:52:41,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:52:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 23:52:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2020-10-14 23:52:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:52:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-14 23:52:41,303 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-14 23:52:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:41,303 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-14 23:52:41,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:52:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-14 23:52:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:52:41,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:41,305 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:41,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:52:41,306 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 913391912, now seen corresponding path program 6 times [2020-10-14 23:52:41,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:41,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106937462] [2020-10-14 23:52:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:41,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:52:41,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-14 23:52:41,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:41,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:52:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:52:41,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:41,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:41,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:41,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:41,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:41,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:41,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:41,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106937462] [2020-10-14 23:52:41,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:41,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:52:41,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674510886] [2020-10-14 23:52:41,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:52:41,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:52:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:52:41,650 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-14 23:52:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:41,747 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 23:52:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:52:41,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 23:52:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:41,749 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:52:41,749 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:52:41,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:52:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:52:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2020-10-14 23:52:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:52:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-14 23:52:41,754 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-14 23:52:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:41,754 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-14 23:52:41,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:52:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-14 23:52:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:52:41,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:41,756 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:41,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:52:41,756 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1271168899, now seen corresponding path program 7 times [2020-10-14 23:52:41,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:41,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14478215] [2020-10-14 23:52:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:41,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:52:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:41,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-14 23:52:41,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:41,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:52:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:52:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:42,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:42,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:42,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:42,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:42,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:42,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:42,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:42,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:42,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14478215] [2020-10-14 23:52:42,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:42,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:52:42,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362354544] [2020-10-14 23:52:42,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:52:42,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:52:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:52:42,092 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-14 23:52:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:42,191 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-10-14 23:52:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:52:42,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:52:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:42,193 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:52:42,194 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 23:52:42,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:52:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 23:52:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 36. [2020-10-14 23:52:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:52:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 23:52:42,200 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-10-14 23:52:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:42,201 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 23:52:42,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:52:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 23:52:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:52:42,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:42,202 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:42,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:52:42,202 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1497469726, now seen corresponding path program 8 times [2020-10-14 23:52:42,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:42,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534118240] [2020-10-14 23:52:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:42,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:52:42,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 23:52:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:42,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:52:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:52:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:42,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:42,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:42,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:42,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:42,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:42,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:42,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:42,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:42,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534118240] [2020-10-14 23:52:42,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:42,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:52:42,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759328119] [2020-10-14 23:52:42,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:52:42,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:42,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:52:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:52:42,522 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-14 23:52:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:42,636 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-14 23:52:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:52:42,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 23:52:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:42,638 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:52:42,638 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:52:42,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:52:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:52:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 35. [2020-10-14 23:52:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:52:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-14 23:52:42,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-14 23:52:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:42,644 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-14 23:52:42,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:52:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-14 23:52:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:52:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:42,645 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:42,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:52:42,645 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -70767623, now seen corresponding path program 9 times [2020-10-14 23:52:42,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:42,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86373030] [2020-10-14 23:52:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:42,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:42,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:52:42,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-14 23:52:42,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:42,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:52:42,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:42,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:52:42,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:43,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:43,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:43,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:43,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:43,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:43,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:43,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:43,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86373030] [2020-10-14 23:52:43,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:43,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:52:43,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932387717] [2020-10-14 23:52:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:52:43,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:52:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:52:43,031 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-14 23:52:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:43,154 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2020-10-14 23:52:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:52:43,155 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 23:52:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:43,156 INFO L225 Difference]: With dead ends: 181 [2020-10-14 23:52:43,156 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 23:52:43,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:52:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 23:52:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 40. [2020-10-14 23:52:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:52:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 23:52:43,162 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2020-10-14 23:52:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:43,163 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 23:52:43,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:52:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 23:52:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:52:43,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:43,164 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:52:43,164 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash 386660884, now seen corresponding path program 10 times [2020-10-14 23:52:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569116983] [2020-10-14 23:52:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:43,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:43,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:52:43,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-14 23:52:43,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:43,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:52:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:43,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:52:43,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:43,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:43,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:43,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:43,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:43,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:43,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:43,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:43,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569116983] [2020-10-14 23:52:43,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:43,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:52:43,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498517417] [2020-10-14 23:52:43,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:52:43,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:52:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:52:43,717 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-10-14 23:52:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:43,868 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-14 23:52:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:52:43,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 23:52:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:43,869 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:52:43,869 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:52:43,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:52:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:52:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 39. [2020-10-14 23:52:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:52:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-14 23:52:43,874 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-14 23:52:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:43,875 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-14 23:52:43,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:52:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-14 23:52:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:52:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:43,876 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:43,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:52:43,876 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1888791919, now seen corresponding path program 11 times [2020-10-14 23:52:43,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:43,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151496268] [2020-10-14 23:52:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:43,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:44,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:44,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:52:44,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 23:52:44,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:44,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:52:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:52:44,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:44,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:44,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:44,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:44,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:44,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:44,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151496268] [2020-10-14 23:52:44,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:44,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:52:44,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418841489] [2020-10-14 23:52:44,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:52:44,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:44,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:52:44,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:52:44,362 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-14 23:52:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:44,498 INFO L93 Difference]: Finished difference Result 235 states and 248 transitions. [2020-10-14 23:52:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:52:44,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 23:52:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:44,500 INFO L225 Difference]: With dead ends: 235 [2020-10-14 23:52:44,500 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 23:52:44,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:52:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 23:52:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 44. [2020-10-14 23:52:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:52:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 23:52:44,506 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 38 [2020-10-14 23:52:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:44,507 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 23:52:44,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:52:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 23:52:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:52:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:44,508 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:44,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:52:44,508 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1967262198, now seen corresponding path program 12 times [2020-10-14 23:52:44,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:44,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696446181] [2020-10-14 23:52:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:44,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:45,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:45,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:52:45,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-14 23:52:45,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:45,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:52:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:52:45,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:45,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:45,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:45,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:45,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:45,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:45,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:45,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:45,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:45,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696446181] [2020-10-14 23:52:45,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:45,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:52:45,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472302450] [2020-10-14 23:52:45,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:52:45,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:52:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:52:45,226 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-14 23:52:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:45,381 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2020-10-14 23:52:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:52:45,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 23:52:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:45,383 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:52:45,383 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:52:45,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:52:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:52:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2020-10-14 23:52:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:52:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-14 23:52:45,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-14 23:52:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:45,388 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-14 23:52:45,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:52:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-14 23:52:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:52:45,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:45,389 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:45,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:52:45,390 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1078492187, now seen corresponding path program 13 times [2020-10-14 23:52:45,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:45,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368516344] [2020-10-14 23:52:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:45,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:45,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:45,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:52:45,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-14 23:52:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:45,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:52:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:52:45,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:46,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:46,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:46,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:46,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:46,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:46,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:46,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:46,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:46,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:46,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:46,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:46,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368516344] [2020-10-14 23:52:46,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:46,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:52:46,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856329138] [2020-10-14 23:52:46,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:52:46,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:52:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:52:46,168 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-14 23:52:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:46,369 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-10-14 23:52:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:52:46,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 23:52:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:46,371 INFO L225 Difference]: With dead ends: 93 [2020-10-14 23:52:46,371 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:52:46,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:52:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:52:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2020-10-14 23:52:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:52:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-14 23:52:46,377 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-14 23:52:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:46,378 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-14 23:52:46,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:52:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-14 23:52:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:52:46,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:46,379 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:46,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:52:46,379 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1669003520, now seen corresponding path program 14 times [2020-10-14 23:52:46,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:46,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544873875] [2020-10-14 23:52:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:46,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:46,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:46,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:46,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:52:46,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:46,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-14 23:52:46,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:46,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:52:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:52:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:47,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:47,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:47,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:47,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:47,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:47,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:47,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:47,176 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 23:52:47,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544873875] [2020-10-14 23:52:47,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:47,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:52:47,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576297438] [2020-10-14 23:52:47,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:52:47,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:52:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:52:47,179 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-14 23:52:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:47,332 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-14 23:52:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:52:47,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 23:52:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:47,333 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:52:47,334 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:52:47,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:52:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:52:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2020-10-14 23:52:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:52:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 23:52:47,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-14 23:52:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:47,338 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 23:52:47,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:52:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 23:52:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:52:47,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:47,339 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:47,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:52:47,340 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2080255835, now seen corresponding path program 15 times [2020-10-14 23:52:47,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:47,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290317382] [2020-10-14 23:52:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:47,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:47,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:47,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:47,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:52:47,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 23:52:47,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:47,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:52:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:52:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:48,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:48,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:48,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:48,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:48,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:48,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:48,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290317382] [2020-10-14 23:52:48,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:48,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:52:48,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864297590] [2020-10-14 23:52:48,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:52:48,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:52:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:52:48,099 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-14 23:52:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:48,264 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2020-10-14 23:52:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:52:48,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 23:52:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:48,267 INFO L225 Difference]: With dead ends: 373 [2020-10-14 23:52:48,267 INFO L226 Difference]: Without dead ends: 367 [2020-10-14 23:52:48,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:52:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-14 23:52:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 52. [2020-10-14 23:52:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:52:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 23:52:48,275 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 46 [2020-10-14 23:52:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:48,275 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 23:52:48,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:52:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 23:52:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:52:48,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:48,276 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:48,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:52:48,277 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1640934646, now seen corresponding path program 16 times [2020-10-14 23:52:48,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:48,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33014690] [2020-10-14 23:52:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:48,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:49,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:49,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:52:49,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-14 23:52:49,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:49,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:52:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:52:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:49,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:49,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:49,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:49,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:49,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:49,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:49,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:49,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:49,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:49,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:49,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:49,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33014690] [2020-10-14 23:52:49,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:49,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:52:49,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470008168] [2020-10-14 23:52:49,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:52:49,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:52:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:52:49,238 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 21 states. [2020-10-14 23:52:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:49,409 INFO L93 Difference]: Finished difference Result 378 states and 396 transitions. [2020-10-14 23:52:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:52:49,410 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 23:52:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:49,412 INFO L225 Difference]: With dead ends: 378 [2020-10-14 23:52:49,412 INFO L226 Difference]: Without dead ends: 372 [2020-10-14 23:52:49,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:52:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-14 23:52:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 57. [2020-10-14 23:52:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:52:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-14 23:52:49,418 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 48 [2020-10-14 23:52:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:49,418 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-14 23:52:49,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:52:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-14 23:52:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:52:49,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:49,420 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:49,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:52:49,420 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 360067025, now seen corresponding path program 17 times [2020-10-14 23:52:49,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:49,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616995554] [2020-10-14 23:52:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:49,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:50,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:50,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:52:50,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:50,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 23:52:50,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:50,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:52:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:52:50,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:50,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:50,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:50,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:52:50,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:50,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:50,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:50,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616995554] [2020-10-14 23:52:50,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:50,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:52:50,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453814548] [2020-10-14 23:52:50,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:52:50,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:50,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:52:50,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:52:50,398 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 22 states. [2020-10-14 23:52:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:50,618 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2020-10-14 23:52:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:52:50,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 23:52:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:50,620 INFO L225 Difference]: With dead ends: 183 [2020-10-14 23:52:50,620 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 23:52:50,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:52:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 23:52:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 53. [2020-10-14 23:52:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:52:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-14 23:52:50,628 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-14 23:52:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:50,628 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-14 23:52:50,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:52:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-14 23:52:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:52:50,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:50,631 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:50,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:52:50,632 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:50,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:50,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2101897196, now seen corresponding path program 18 times [2020-10-14 23:52:50,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:50,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295234163] [2020-10-14 23:52:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:50,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:51,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:51,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:52:51,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-14 23:52:51,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:51,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:51,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:52:51,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:51,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:52:51,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:51,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:51,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:51,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295234163] [2020-10-14 23:52:51,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:51,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:52:51,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68851400] [2020-10-14 23:52:51,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:52:51,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:52:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:52:51,649 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-14 23:52:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:51,830 INFO L93 Difference]: Finished difference Result 496 states and 516 transitions. [2020-10-14 23:52:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:52:51,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 23:52:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:51,833 INFO L225 Difference]: With dead ends: 496 [2020-10-14 23:52:51,833 INFO L226 Difference]: Without dead ends: 490 [2020-10-14 23:52:51,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:52:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-14 23:52:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 58. [2020-10-14 23:52:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:52:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 23:52:51,839 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2020-10-14 23:52:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:51,839 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 23:52:51,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:52:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 23:52:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:52:51,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:51,841 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:51,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:52:51,841 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash 963446087, now seen corresponding path program 19 times [2020-10-14 23:52:51,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:51,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567285619] [2020-10-14 23:52:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:51,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:51,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:52,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:52,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:52:52,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:52,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 23:52:52,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:52,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:52,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:52,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:52,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:52,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567285619] [2020-10-14 23:52:52,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:52,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:52:52,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167542709] [2020-10-14 23:52:52,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:52:52,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:52,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:52:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:52:52,597 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 24 states. [2020-10-14 23:52:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:52,798 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2020-10-14 23:52:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:52:52,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 23:52:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:52,799 INFO L225 Difference]: With dead ends: 163 [2020-10-14 23:52:52,800 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 23:52:52,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:52:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 23:52:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 57. [2020-10-14 23:52:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:52:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-14 23:52:52,803 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-14 23:52:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:52,804 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-14 23:52:52,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:52:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-14 23:52:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:52:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:52,805 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:52,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:52:52,805 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2128590818, now seen corresponding path program 20 times [2020-10-14 23:52:52,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:52,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833799729] [2020-10-14 23:52:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:53,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:53,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:52:53,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:53,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-14 23:52:53,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:53,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:53,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:52:53,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:53,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:52:53,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:53,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:53,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:53,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:53,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:53,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:53,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:53,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:53,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833799729] [2020-10-14 23:52:53,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:53,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:52:53,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324675961] [2020-10-14 23:52:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:52:53,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:53,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:52:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:52:53,830 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-14 23:52:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:54,013 INFO L93 Difference]: Finished difference Result 588 states and 610 transitions. [2020-10-14 23:52:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:52:54,014 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 23:52:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:54,017 INFO L225 Difference]: With dead ends: 588 [2020-10-14 23:52:54,017 INFO L226 Difference]: Without dead ends: 582 [2020-10-14 23:52:54,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:52:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-14 23:52:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 62. [2020-10-14 23:52:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:52:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 23:52:54,024 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-10-14 23:52:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:54,024 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 23:52:54,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:52:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 23:52:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:52:54,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:54,035 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:54,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:52:54,035 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:54,035 INFO L82 PathProgramCache]: Analyzing trace with hash 846213053, now seen corresponding path program 21 times [2020-10-14 23:52:54,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:54,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875615642] [2020-10-14 23:52:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:54,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:54,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:52:54,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:52:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:55,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:55,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:55,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:55,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:55,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:55,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:55,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:55,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875615642] [2020-10-14 23:52:55,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:55,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:52:55,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881748403] [2020-10-14 23:52:55,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:52:55,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:52:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:52:55,230 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 26 states. [2020-10-14 23:52:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:55,448 INFO L93 Difference]: Finished difference Result 593 states and 616 transitions. [2020-10-14 23:52:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:52:55,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 23:52:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:55,454 INFO L225 Difference]: With dead ends: 593 [2020-10-14 23:52:55,454 INFO L226 Difference]: Without dead ends: 587 [2020-10-14 23:52:55,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:52:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-14 23:52:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 67. [2020-10-14 23:52:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:52:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-14 23:52:55,461 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 58 [2020-10-14 23:52:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:55,461 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-14 23:52:55,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:52:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-14 23:52:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:52:55,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:55,462 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:55,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:52:55,462 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1136794840, now seen corresponding path program 22 times [2020-10-14 23:52:55,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:55,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607871232] [2020-10-14 23:52:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:55,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:56,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:56,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:52:56,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:56,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-14 23:52:56,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:56,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:52:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:52:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:56,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:56,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:56,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:56,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:56,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:56,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:56,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:56,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:56,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607871232] [2020-10-14 23:52:56,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:56,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:52:56,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231058675] [2020-10-14 23:52:56,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:52:56,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:52:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:52:56,865 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 27 states. [2020-10-14 23:52:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:57,104 INFO L93 Difference]: Finished difference Result 598 states and 622 transitions. [2020-10-14 23:52:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:52:57,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 23:52:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:57,108 INFO L225 Difference]: With dead ends: 598 [2020-10-14 23:52:57,108 INFO L226 Difference]: Without dead ends: 592 [2020-10-14 23:52:57,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:52:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-14 23:52:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 72. [2020-10-14 23:52:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:52:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-14 23:52:57,114 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 60 [2020-10-14 23:52:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:57,115 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-14 23:52:57,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:52:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-14 23:52:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:52:57,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:57,116 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:57,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:52:57,116 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1213017907, now seen corresponding path program 23 times [2020-10-14 23:52:57,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:57,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886953314] [2020-10-14 23:52:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:57,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:57,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:52:57,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:57,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 23:52:57,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:57,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:52:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:52:57,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:52:58,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:58,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:58,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:58,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:58,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:58,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:58,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:58,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886953314] [2020-10-14 23:52:58,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:58,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:52:58,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652687381] [2020-10-14 23:52:58,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:52:58,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:52:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:52:58,065 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 28 states. [2020-10-14 23:52:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:58,286 INFO L93 Difference]: Finished difference Result 603 states and 628 transitions. [2020-10-14 23:52:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:52:58,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 23:52:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:58,289 INFO L225 Difference]: With dead ends: 603 [2020-10-14 23:52:58,290 INFO L226 Difference]: Without dead ends: 597 [2020-10-14 23:52:58,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:52:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-14 23:52:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 77. [2020-10-14 23:52:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:52:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-14 23:52:58,302 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 62 [2020-10-14 23:52:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:58,302 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-14 23:52:58,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:52:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-14 23:52:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:52:58,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:58,304 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:58,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:52:58,305 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1448941262, now seen corresponding path program 24 times [2020-10-14 23:52:58,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:58,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164894265] [2020-10-14 23:52:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:58,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:59,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:59,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:52:59,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:59,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-14 23:52:59,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:59,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:59,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:52:59,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:52:59,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 23:52:59,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:59,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:59,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:59,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:59,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:59,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:59,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:59,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:00,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164894265] [2020-10-14 23:53:00,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:00,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:53:00,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821119805] [2020-10-14 23:53:00,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:53:00,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:53:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:53:00,003 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 29 states. [2020-10-14 23:53:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:00,327 INFO L93 Difference]: Finished difference Result 608 states and 634 transitions. [2020-10-14 23:53:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:53:00,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 23:53:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:00,332 INFO L225 Difference]: With dead ends: 608 [2020-10-14 23:53:00,332 INFO L226 Difference]: Without dead ends: 602 [2020-10-14 23:53:00,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:53:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-14 23:53:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 82. [2020-10-14 23:53:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 23:53:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-14 23:53:00,342 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 64 [2020-10-14 23:53:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:00,342 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-14 23:53:00,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:53:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-14 23:53:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:53:00,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:00,344 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:00,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:53:00,345 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 538018729, now seen corresponding path program 25 times [2020-10-14 23:53:00,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:00,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426628911] [2020-10-14 23:53:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:00,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:01,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 23:53:01,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:01,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:01,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:01,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:01,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:01,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:01,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426628911] [2020-10-14 23:53:01,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:01,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:53:01,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815900637] [2020-10-14 23:53:01,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:53:01,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:01,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:53:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:53:01,598 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 30 states. [2020-10-14 23:53:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:01,833 INFO L93 Difference]: Finished difference Result 611 states and 638 transitions. [2020-10-14 23:53:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:53:01,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-14 23:53:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:01,837 INFO L225 Difference]: With dead ends: 611 [2020-10-14 23:53:01,837 INFO L226 Difference]: Without dead ends: 605 [2020-10-14 23:53:01,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:53:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-14 23:53:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 87. [2020-10-14 23:53:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:53:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-14 23:53:01,844 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 66 [2020-10-14 23:53:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:01,844 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-14 23:53:01,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:53:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-14 23:53:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:53:01,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:01,845 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:01,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:53:01,846 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1314792900, now seen corresponding path program 26 times [2020-10-14 23:53:01,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:01,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170099843] [2020-10-14 23:53:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:02,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:02,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:53:02,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-14 23:53:02,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:02,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:53:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:53:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:03,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:03,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:03,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170099843] [2020-10-14 23:53:03,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:03,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:53:03,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47246045] [2020-10-14 23:53:03,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:53:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:53:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:53:03,376 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 31 states. [2020-10-14 23:53:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:03,665 INFO L93 Difference]: Finished difference Result 452 states and 486 transitions. [2020-10-14 23:53:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:53:03,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-14 23:53:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:03,668 INFO L225 Difference]: With dead ends: 452 [2020-10-14 23:53:03,668 INFO L226 Difference]: Without dead ends: 434 [2020-10-14 23:53:03,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:53:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-14 23:53:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 71. [2020-10-14 23:53:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:53:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-14 23:53:03,674 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-14 23:53:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:03,674 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-14 23:53:03,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:53:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-14 23:53:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:53:03,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:03,675 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:03,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:53:03,676 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash 470461727, now seen corresponding path program 27 times [2020-10-14 23:53:03,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:03,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074959932] [2020-10-14 23:53:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:03,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:04,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:53:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:53:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:04,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:04,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:04,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:04,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:04,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:53:04,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:04,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:04,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:04,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074959932] [2020-10-14 23:53:04,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:04,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:53:04,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053272746] [2020-10-14 23:53:04,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:53:04,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:53:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:53:04,894 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-14 23:53:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:05,145 INFO L93 Difference]: Finished difference Result 973 states and 1002 transitions. [2020-10-14 23:53:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:53:05,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-14 23:53:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:05,151 INFO L225 Difference]: With dead ends: 973 [2020-10-14 23:53:05,151 INFO L226 Difference]: Without dead ends: 967 [2020-10-14 23:53:05,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:53:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-14 23:53:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 76. [2020-10-14 23:53:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:53:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 23:53:05,161 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 70 [2020-10-14 23:53:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:05,161 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 23:53:05,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:53:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 23:53:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 23:53:05,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:05,162 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:05,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:53:05,162 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash 817023418, now seen corresponding path program 28 times [2020-10-14 23:53:05,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:05,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655563351] [2020-10-14 23:53:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:06,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:06,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 23:53:06,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 23:53:06,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:06,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:06,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:06,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:06,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:06,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:06,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:06,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:06,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655563351] [2020-10-14 23:53:06,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:06,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:53:06,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84043249] [2020-10-14 23:53:06,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:53:06,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:53:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:53:06,882 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 33 states. [2020-10-14 23:53:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:07,205 INFO L93 Difference]: Finished difference Result 226 states and 257 transitions. [2020-10-14 23:53:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:53:07,208 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-14 23:53:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:07,210 INFO L225 Difference]: With dead ends: 226 [2020-10-14 23:53:07,210 INFO L226 Difference]: Without dead ends: 218 [2020-10-14 23:53:07,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:53:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-14 23:53:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 75. [2020-10-14 23:53:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:53:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-14 23:53:07,214 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-14 23:53:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:07,215 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-14 23:53:07,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:53:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-14 23:53:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 23:53:07,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:07,216 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:07,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:53:07,216 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:07,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1144640619, now seen corresponding path program 29 times [2020-10-14 23:53:07,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:07,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871963394] [2020-10-14 23:53:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:07,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:08,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:08,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 23:53:08,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:08,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-14 23:53:08,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:08,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:08,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:53:08,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:08,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 23:53:08,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:08,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:08,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:08,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:08,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:08,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:08,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:08,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:08,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:08,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871963394] [2020-10-14 23:53:08,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:08,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:53:08,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080322747] [2020-10-14 23:53:08,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:53:08,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:53:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:53:08,818 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-14 23:53:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:09,146 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2020-10-14 23:53:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:53:09,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-14 23:53:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:09,149 INFO L225 Difference]: With dead ends: 173 [2020-10-14 23:53:09,149 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 23:53:09,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:53:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 23:53:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2020-10-14 23:53:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:53:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-14 23:53:09,153 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-14 23:53:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:09,154 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-14 23:53:09,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:53:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-14 23:53:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 23:53:09,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:09,155 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:09,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:53:09,155 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:09,156 INFO L82 PathProgramCache]: Analyzing trace with hash -813137232, now seen corresponding path program 30 times [2020-10-14 23:53:09,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:09,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296683885] [2020-10-14 23:53:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:09,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:09,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:09,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 23:53:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:10,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:10,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:10,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:10,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:10,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296683885] [2020-10-14 23:53:10,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:10,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:53:10,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892121024] [2020-10-14 23:53:10,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:53:10,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:53:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:53:10,435 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-14 23:53:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:10,773 INFO L93 Difference]: Finished difference Result 1168 states and 1200 transitions. [2020-10-14 23:53:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:53:10,774 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-14 23:53:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:10,780 INFO L225 Difference]: With dead ends: 1168 [2020-10-14 23:53:10,781 INFO L226 Difference]: Without dead ends: 1162 [2020-10-14 23:53:10,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:53:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-10-14 23:53:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 82. [2020-10-14 23:53:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 23:53:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 23:53:10,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2020-10-14 23:53:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:10,792 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 23:53:10,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:53:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 23:53:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 23:53:10,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:10,794 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:10,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:53:10,794 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -65962229, now seen corresponding path program 31 times [2020-10-14 23:53:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:10,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125010306] [2020-10-14 23:53:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:10,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:11,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:11,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 23:53:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:12,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:12,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:12,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:12,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:12,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:12,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:12,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125010306] [2020-10-14 23:53:12,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:12,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:53:12,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473420670] [2020-10-14 23:53:12,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:53:12,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:12,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:53:12,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:53:12,261 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 36 states. [2020-10-14 23:53:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:12,600 INFO L93 Difference]: Finished difference Result 247 states and 281 transitions. [2020-10-14 23:53:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:53:12,600 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-14 23:53:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:12,602 INFO L225 Difference]: With dead ends: 247 [2020-10-14 23:53:12,602 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 23:53:12,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:53:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 23:53:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 81. [2020-10-14 23:53:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:53:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-14 23:53:12,607 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-14 23:53:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:12,608 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-14 23:53:12,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:53:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-14 23:53:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:53:12,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:12,609 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:12,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:53:12,609 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash 709677222, now seen corresponding path program 32 times [2020-10-14 23:53:12,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:12,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249549128] [2020-10-14 23:53:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:12,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:53:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 23:53:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:13,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:13,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:13,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:13,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:13,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249549128] [2020-10-14 23:53:13,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:13,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:53:13,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923784858] [2020-10-14 23:53:13,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:53:13,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:53:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:53:13,933 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-14 23:53:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:14,255 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-10-14 23:53:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:53:14,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-14 23:53:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:14,257 INFO L225 Difference]: With dead ends: 188 [2020-10-14 23:53:14,258 INFO L226 Difference]: Without dead ends: 182 [2020-10-14 23:53:14,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:53:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-14 23:53:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 83. [2020-10-14 23:53:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:53:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-14 23:53:14,263 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-14 23:53:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:14,263 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-14 23:53:14,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:53:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-14 23:53:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:53:14,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:14,265 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:14,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:53:14,265 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1225119871, now seen corresponding path program 33 times [2020-10-14 23:53:14,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:14,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233608897] [2020-10-14 23:53:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:15,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:53:15,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 23:53:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:16,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:16,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:16,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:16,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:16,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233608897] [2020-10-14 23:53:16,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:16,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:53:16,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851292338] [2020-10-14 23:53:16,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:53:16,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:53:16,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:53:16,398 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-14 23:53:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:16,715 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2020-10-14 23:53:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:53:16,715 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-14 23:53:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:16,716 INFO L225 Difference]: With dead ends: 193 [2020-10-14 23:53:16,717 INFO L226 Difference]: Without dead ends: 187 [2020-10-14 23:53:16,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:53:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-14 23:53:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2020-10-14 23:53:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 23:53:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-14 23:53:16,722 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-14 23:53:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:16,723 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-14 23:53:16,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:53:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-14 23:53:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 23:53:16,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:16,725 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:16,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:53:16,726 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash -844287076, now seen corresponding path program 34 times [2020-10-14 23:53:16,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:16,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610268911] [2020-10-14 23:53:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:17,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:53:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 23:53:17,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:18,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:18,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:18,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:18,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610268911] [2020-10-14 23:53:18,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:18,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:53:18,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933423399] [2020-10-14 23:53:18,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:53:18,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:53:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:53:18,334 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-14 23:53:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:18,684 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2020-10-14 23:53:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:53:18,684 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-14 23:53:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:18,686 INFO L225 Difference]: With dead ends: 198 [2020-10-14 23:53:18,686 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 23:53:18,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:53:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 23:53:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 87. [2020-10-14 23:53:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:53:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-14 23:53:18,690 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-14 23:53:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:18,691 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-14 23:53:18,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:53:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-14 23:53:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 23:53:18,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:18,692 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:18,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:53:18,692 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash 63808759, now seen corresponding path program 35 times [2020-10-14 23:53:18,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:18,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41621615] [2020-10-14 23:53:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:18,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:20,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 23:53:20,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:20,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:20,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:20,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:20,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:20,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41621615] [2020-10-14 23:53:20,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:20,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 23:53:20,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653074106] [2020-10-14 23:53:20,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 23:53:20,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 23:53:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:53:20,948 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-14 23:53:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:21,353 INFO L93 Difference]: Finished difference Result 1533 states and 1570 transitions. [2020-10-14 23:53:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:53:21,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-14 23:53:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:21,360 INFO L225 Difference]: With dead ends: 1533 [2020-10-14 23:53:21,360 INFO L226 Difference]: Without dead ends: 1527 [2020-10-14 23:53:21,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:53:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-10-14 23:53:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 92. [2020-10-14 23:53:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 23:53:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-14 23:53:21,372 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2020-10-14 23:53:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:21,372 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-14 23:53:21,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 23:53:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-14 23:53:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 23:53:21,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:21,373 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:21,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:53:21,374 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash 865545106, now seen corresponding path program 36 times [2020-10-14 23:53:21,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:21,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364226511] [2020-10-14 23:53:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:22,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:53:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 23:53:22,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:23,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:23,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:23,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:23,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:23,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:23,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:23,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364226511] [2020-10-14 23:53:23,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:23,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:53:23,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436060545] [2020-10-14 23:53:23,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:53:23,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:53:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:53:23,527 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 41 states. [2020-10-14 23:53:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:23,913 INFO L93 Difference]: Finished difference Result 1538 states and 1576 transitions. [2020-10-14 23:53:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:53:23,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-14 23:53:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:23,920 INFO L225 Difference]: With dead ends: 1538 [2020-10-14 23:53:23,921 INFO L226 Difference]: Without dead ends: 1532 [2020-10-14 23:53:23,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:53:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2020-10-14 23:53:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 97. [2020-10-14 23:53:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:53:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-14 23:53:23,934 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 88 [2020-10-14 23:53:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:23,935 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-14 23:53:23,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:53:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-14 23:53:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 23:53:23,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:23,936 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:23,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:53:23,936 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1759938707, now seen corresponding path program 37 times [2020-10-14 23:53:23,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:23,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892317503] [2020-10-14 23:53:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:25,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:25,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 23:53:25,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 23:53:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:26,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:26,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:26,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:26,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:26,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892317503] [2020-10-14 23:53:26,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:26,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 23:53:26,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363113313] [2020-10-14 23:53:26,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 23:53:26,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 23:53:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:53:26,263 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 42 states. [2020-10-14 23:53:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:26,641 INFO L93 Difference]: Finished difference Result 1543 states and 1582 transitions. [2020-10-14 23:53:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:53:26,642 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-14 23:53:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:26,648 INFO L225 Difference]: With dead ends: 1543 [2020-10-14 23:53:26,648 INFO L226 Difference]: Without dead ends: 1537 [2020-10-14 23:53:26,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:53:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2020-10-14 23:53:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 102. [2020-10-14 23:53:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:53:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-14 23:53:26,660 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 90 [2020-10-14 23:53:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:26,660 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-14 23:53:26,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 23:53:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-14 23:53:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 23:53:26,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:26,661 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:26,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:53:26,661 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash 590887048, now seen corresponding path program 38 times [2020-10-14 23:53:26,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:26,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545472230] [2020-10-14 23:53:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:28,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 23:53:28,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-14 23:53:28,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:28,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:53:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 23:53:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:28,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:28,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:28,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:28,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:28,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545472230] [2020-10-14 23:53:28,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:28,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:53:28,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163670322] [2020-10-14 23:53:28,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:53:28,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:53:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:53:28,940 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-14 23:53:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:29,299 INFO L93 Difference]: Finished difference Result 1548 states and 1588 transitions. [2020-10-14 23:53:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:53:29,299 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-14 23:53:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:29,305 INFO L225 Difference]: With dead ends: 1548 [2020-10-14 23:53:29,306 INFO L226 Difference]: Without dead ends: 1542 [2020-10-14 23:53:29,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:53:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-10-14 23:53:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 107. [2020-10-14 23:53:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:53:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-10-14 23:53:29,318 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 92 [2020-10-14 23:53:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:29,318 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-10-14 23:53:29,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:53:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-10-14 23:53:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:53:29,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:29,319 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:29,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:53:29,319 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 581639907, now seen corresponding path program 39 times [2020-10-14 23:53:29,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:29,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167784028] [2020-10-14 23:53:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:29,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:30,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:30,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:53:30,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 23:53:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:31,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:31,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:31,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:31,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:31,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:31,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:31,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:31,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:31,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:31,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167784028] [2020-10-14 23:53:31,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:31,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 23:53:31,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767786606] [2020-10-14 23:53:31,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 23:53:31,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 23:53:31,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:53:31,140 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 44 states. [2020-10-14 23:53:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:31,664 INFO L93 Difference]: Finished difference Result 531 states and 576 transitions. [2020-10-14 23:53:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 23:53:31,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-14 23:53:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:31,666 INFO L225 Difference]: With dead ends: 531 [2020-10-14 23:53:31,667 INFO L226 Difference]: Without dead ends: 517 [2020-10-14 23:53:31,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:53:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-14 23:53:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 97. [2020-10-14 23:53:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:53:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-14 23:53:31,673 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-14 23:53:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:31,674 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-14 23:53:31,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 23:53:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-14 23:53:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:53:31,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:31,675 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:31,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:53:31,675 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 285071998, now seen corresponding path program 40 times [2020-10-14 23:53:31,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:31,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843870939] [2020-10-14 23:53:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:32,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:33,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:33,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 23:53:33,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:33,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-14 23:53:33,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:33,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:53:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 23:53:33,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:34,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:34,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:34,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:34,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:34,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:53:34,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:34,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:34,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843870939] [2020-10-14 23:53:34,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:34,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:53:34,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776334221] [2020-10-14 23:53:34,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:53:34,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:53:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:53:34,194 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-14 23:53:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:34,640 INFO L93 Difference]: Finished difference Result 228 states and 270 transitions. [2020-10-14 23:53:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:53:34,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-14 23:53:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:34,643 INFO L225 Difference]: With dead ends: 228 [2020-10-14 23:53:34,643 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 23:53:34,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:53:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 23:53:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 99. [2020-10-14 23:53:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:53:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-14 23:53:34,647 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-14 23:53:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:34,648 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-14 23:53:34,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:53:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-14 23:53:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 23:53:34,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:34,648 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:34,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:53:34,648 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1248847015, now seen corresponding path program 41 times [2020-10-14 23:53:34,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:34,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872508680] [2020-10-14 23:53:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:36,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:36,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 23:53:36,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:37,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:37,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:37,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:37,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:37,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872508680] [2020-10-14 23:53:37,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:37,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 23:53:37,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070023299] [2020-10-14 23:53:37,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 23:53:37,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 23:53:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:53:37,356 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-14 23:53:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:37,806 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2020-10-14 23:53:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:53:37,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-14 23:53:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:37,808 INFO L225 Difference]: With dead ends: 233 [2020-10-14 23:53:37,809 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 23:53:37,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:53:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 23:53:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 101. [2020-10-14 23:53:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:53:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-14 23:53:37,813 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-14 23:53:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:37,814 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-14 23:53:37,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 23:53:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-14 23:53:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 23:53:37,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:37,815 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:37,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:53:37,815 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2123731316, now seen corresponding path program 42 times [2020-10-14 23:53:37,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:37,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521073998] [2020-10-14 23:53:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:38,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:53:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 23:53:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:40,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:40,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:40,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:40,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:40,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:40,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:53:40,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:40,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:40,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:40,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:40,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:40,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:53:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:40,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521073998] [2020-10-14 23:53:40,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:40,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:53:40,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233786219] [2020-10-14 23:53:40,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:53:40,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:53:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:53:40,061 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-14 23:53:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:40,505 INFO L93 Difference]: Finished difference Result 238 states and 282 transitions. [2020-10-14 23:53:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:53:40,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-14 23:53:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:40,507 INFO L225 Difference]: With dead ends: 238 [2020-10-14 23:53:40,507 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 23:53:40,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:53:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 23:53:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 103. [2020-10-14 23:53:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:53:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-14 23:53:40,513 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-14 23:53:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:40,513 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-14 23:53:40,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:53:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-14 23:53:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 23:53:40,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:40,514 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:40,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:53:40,514 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash 471198927, now seen corresponding path program 43 times [2020-10-14 23:53:40,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:40,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251143440] [2020-10-14 23:53:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:40,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:42,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:42,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1661 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 23:53:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:43,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:43,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:43,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251143440] [2020-10-14 23:53:43,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:43,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:53:43,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596785036] [2020-10-14 23:53:43,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:53:43,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:53:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:53:43,364 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-14 23:53:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:43,850 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2020-10-14 23:53:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:53:43,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-14 23:53:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:43,853 INFO L225 Difference]: With dead ends: 243 [2020-10-14 23:53:43,853 INFO L226 Difference]: Without dead ends: 237 [2020-10-14 23:53:43,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:53:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-14 23:53:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 105. [2020-10-14 23:53:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:53:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-14 23:53:43,859 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-14 23:53:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:43,859 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-14 23:53:43,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:53:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-14 23:53:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 23:53:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:43,862 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:43,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:53:43,867 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1525472618, now seen corresponding path program 44 times [2020-10-14 23:53:43,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:43,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232769711] [2020-10-14 23:53:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:44,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:44,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:53:44,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 23:53:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:46,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:46,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:46,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:46,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:46,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232769711] [2020-10-14 23:53:46,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:46,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:53:46,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224036313] [2020-10-14 23:53:46,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:53:46,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:46,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:53:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:53:46,048 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-14 23:53:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:46,506 INFO L93 Difference]: Finished difference Result 2316 states and 2362 transitions. [2020-10-14 23:53:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:53:46,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-14 23:53:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:46,513 INFO L225 Difference]: With dead ends: 2316 [2020-10-14 23:53:46,514 INFO L226 Difference]: Without dead ends: 2310 [2020-10-14 23:53:46,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:53:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-10-14 23:53:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 110. [2020-10-14 23:53:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:53:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-14 23:53:46,524 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-10-14 23:53:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:46,524 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-14 23:53:46,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:53:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-14 23:53:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:53:46,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:46,525 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:46,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:53:46,525 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1070207813, now seen corresponding path program 45 times [2020-10-14 23:53:46,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:46,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041537833] [2020-10-14 23:53:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:48,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:48,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:53:48,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 23:53:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:49,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:49,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:49,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:49,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041537833] [2020-10-14 23:53:49,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:49,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 23:53:49,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874333505] [2020-10-14 23:53:49,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 23:53:49,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 23:53:49,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:53:49,682 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 50 states. [2020-10-14 23:53:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:50,347 INFO L93 Difference]: Finished difference Result 345 states and 393 transitions. [2020-10-14 23:53:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 23:53:50,347 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-14 23:53:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:50,350 INFO L225 Difference]: With dead ends: 345 [2020-10-14 23:53:50,350 INFO L226 Difference]: Without dead ends: 337 [2020-10-14 23:53:50,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:53:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-14 23:53:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 109. [2020-10-14 23:53:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:53:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-14 23:53:50,359 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-14 23:53:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:50,359 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-14 23:53:50,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 23:53:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-14 23:53:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 23:53:50,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:50,361 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:50,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:53:50,361 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1647394400, now seen corresponding path program 46 times [2020-10-14 23:53:50,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:50,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542147167] [2020-10-14 23:53:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:52,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:52,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 23:53:52,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:52,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2539 [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 23:53:52,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:54,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:54,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:54,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:54,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:54,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:54,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:54,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542147167] [2020-10-14 23:53:54,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:54,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 23:53:54,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618204511] [2020-10-14 23:53:54,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 23:53:54,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 23:53:54,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:53:54,227 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 51 states. [2020-10-14 23:53:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:54,731 INFO L93 Difference]: Finished difference Result 258 states and 306 transitions. [2020-10-14 23:53:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 23:53:54,732 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-14 23:53:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:54,734 INFO L225 Difference]: With dead ends: 258 [2020-10-14 23:53:54,734 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 23:53:54,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:53:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 23:53:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 111. [2020-10-14 23:53:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 23:53:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-14 23:53:54,737 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2020-10-14 23:53:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:54,738 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-14 23:53:54,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 23:53:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-14 23:53:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 23:53:54,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:54,738 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:54,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:53:54,739 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2022043973, now seen corresponding path program 47 times [2020-10-14 23:53:54,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:54,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099480157] [2020-10-14 23:53:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:56,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:56,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2046 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 23:53:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:58,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:53:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:58,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:58,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:53:58,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:53:58,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:53:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:53:58,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:53:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:53:58,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099480157] [2020-10-14 23:53:58,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:53:58,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 23:53:58,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677872509] [2020-10-14 23:53:58,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 23:53:58,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:53:58,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 23:53:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:53:58,128 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 52 states. [2020-10-14 23:53:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:53:58,698 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2020-10-14 23:53:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 23:53:58,699 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-14 23:53:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:53:58,701 INFO L225 Difference]: With dead ends: 263 [2020-10-14 23:53:58,701 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 23:53:58,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:53:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 23:53:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 113. [2020-10-14 23:53:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 23:53:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-14 23:53:58,706 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-10-14 23:53:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:53:58,706 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-14 23:53:58,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 23:53:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-14 23:53:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 23:53:58,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:53:58,708 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:53:58,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:53:58,708 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:53:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:53:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2110796886, now seen corresponding path program 48 times [2020-10-14 23:53:58,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:53:58,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158087566] [2020-10-14 23:53:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:53:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:53:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:53:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:01,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:01,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 23:54:01,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2764 [2020-10-14 23:54:01,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:01,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 23:54:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:54:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 23:54:01,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:02,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:02,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:02,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:02,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158087566] [2020-10-14 23:54:02,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:02,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 23:54:02,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505188763] [2020-10-14 23:54:02,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 23:54:02,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 23:54:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:54:02,951 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 53 states. [2020-10-14 23:54:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:03,500 INFO L93 Difference]: Finished difference Result 2716 states and 2766 transitions. [2020-10-14 23:54:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 23:54:03,501 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-14 23:54:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:03,510 INFO L225 Difference]: With dead ends: 2716 [2020-10-14 23:54:03,510 INFO L226 Difference]: Without dead ends: 2710 [2020-10-14 23:54:03,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:54:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-10-14 23:54:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 118. [2020-10-14 23:54:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 23:54:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 23:54:03,526 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2020-10-14 23:54:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:03,526 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 23:54:03,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 23:54:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 23:54:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 23:54:03,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:03,527 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:03,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:54:03,527 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 926113585, now seen corresponding path program 49 times [2020-10-14 23:54:03,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:03,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105712520] [2020-10-14 23:54:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:05,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:05,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 23:54:05,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:05,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 23:54:05,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:07,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:07,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:07,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:07,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:07,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:07,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105712520] [2020-10-14 23:54:07,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:07,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 23:54:07,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451748530] [2020-10-14 23:54:07,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 23:54:07,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 23:54:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:54:07,483 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 54 states. [2020-10-14 23:54:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:08,111 INFO L93 Difference]: Finished difference Result 373 states and 425 transitions. [2020-10-14 23:54:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 23:54:08,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-14 23:54:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:08,114 INFO L225 Difference]: With dead ends: 373 [2020-10-14 23:54:08,114 INFO L226 Difference]: Without dead ends: 365 [2020-10-14 23:54:08,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:54:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-14 23:54:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 117. [2020-10-14 23:54:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:54:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-14 23:54:08,118 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2020-10-14 23:54:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:08,118 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-14 23:54:08,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 23:54:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-14 23:54:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 23:54:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:08,119 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:08,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:54:08,119 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash 611794764, now seen corresponding path program 50 times [2020-10-14 23:54:08,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:08,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915412986] [2020-10-14 23:54:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:08,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2575 [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:10,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 23:54:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-14 23:54:10,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:12,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:12,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:12,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:12,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:54:12,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:12,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:12,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:12,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:12,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:54:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:12,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915412986] [2020-10-14 23:54:12,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:12,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 23:54:12,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215497692] [2020-10-14 23:54:12,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 23:54:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 23:54:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:54:12,235 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 55 states. [2020-10-14 23:54:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:12,840 INFO L93 Difference]: Finished difference Result 278 states and 330 transitions. [2020-10-14 23:54:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 23:54:12,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-14 23:54:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:12,843 INFO L225 Difference]: With dead ends: 278 [2020-10-14 23:54:12,844 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 23:54:12,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:54:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 23:54:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 119. [2020-10-14 23:54:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:54:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-14 23:54:12,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2020-10-14 23:54:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:12,850 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-14 23:54:12,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 23:54:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-14 23:54:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:54:12,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:12,852 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:12,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:54:12,852 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -800881497, now seen corresponding path program 51 times [2020-10-14 23:54:12,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:12,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245318691] [2020-10-14 23:54:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:15,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2569 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 23:54:15,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:17,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:17,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:17,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:17,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245318691] [2020-10-14 23:54:17,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:17,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 23:54:17,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955810137] [2020-10-14 23:54:17,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 23:54:17,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 23:54:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:54:17,112 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 56 states. [2020-10-14 23:54:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:17,773 INFO L93 Difference]: Finished difference Result 283 states and 336 transitions. [2020-10-14 23:54:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 23:54:17,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-14 23:54:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:17,776 INFO L225 Difference]: With dead ends: 283 [2020-10-14 23:54:17,776 INFO L226 Difference]: Without dead ends: 277 [2020-10-14 23:54:17,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:54:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-14 23:54:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 121. [2020-10-14 23:54:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 23:54:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-14 23:54:17,781 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2020-10-14 23:54:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:17,781 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-14 23:54:17,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 23:54:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-14 23:54:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 23:54:17,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:17,782 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:17,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:54:17,783 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1173102782, now seen corresponding path program 52 times [2020-10-14 23:54:17,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:17,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708620516] [2020-10-14 23:54:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:17,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:20,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2963 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 23:54:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:22,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:22,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:22,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:22,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708620516] [2020-10-14 23:54:22,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:22,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 23:54:22,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093596773] [2020-10-14 23:54:22,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 23:54:22,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 23:54:22,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:54:22,400 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 57 states. [2020-10-14 23:54:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:23,073 INFO L93 Difference]: Finished difference Result 3148 states and 3202 transitions. [2020-10-14 23:54:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 23:54:23,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-14 23:54:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:23,084 INFO L225 Difference]: With dead ends: 3148 [2020-10-14 23:54:23,084 INFO L226 Difference]: Without dead ends: 3142 [2020-10-14 23:54:23,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:54:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2020-10-14 23:54:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 126. [2020-10-14 23:54:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 23:54:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-14 23:54:23,094 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 120 [2020-10-14 23:54:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:23,094 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-14 23:54:23,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 23:54:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-14 23:54:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 23:54:23,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:23,095 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:23,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:54:23,096 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1899495197, now seen corresponding path program 53 times [2020-10-14 23:54:23,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:23,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823759653] [2020-10-14 23:54:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:23,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 23:54:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-14 23:54:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:27,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:27,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:27,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:27,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:27,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:27,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:27,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823759653] [2020-10-14 23:54:27,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:27,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 23:54:27,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791499574] [2020-10-14 23:54:27,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 23:54:27,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 23:54:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:54:27,638 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 58 states. [2020-10-14 23:54:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:28,378 INFO L93 Difference]: Finished difference Result 401 states and 457 transitions. [2020-10-14 23:54:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 23:54:28,379 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-14 23:54:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:28,381 INFO L225 Difference]: With dead ends: 401 [2020-10-14 23:54:28,381 INFO L226 Difference]: Without dead ends: 393 [2020-10-14 23:54:28,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:54:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-14 23:54:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 125. [2020-10-14 23:54:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:54:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-14 23:54:28,386 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2020-10-14 23:54:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:28,386 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-14 23:54:28,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 23:54:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-14 23:54:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 23:54:28,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:28,387 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:28,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:54:28,388 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash -271346632, now seen corresponding path program 54 times [2020-10-14 23:54:28,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:28,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419573725] [2020-10-14 23:54:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:29,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:31,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 23:54:31,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:31,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 23:54:31,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:32,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:32,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419573725] [2020-10-14 23:54:32,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:32,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 23:54:32,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057678411] [2020-10-14 23:54:32,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 23:54:32,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 23:54:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:54:32,930 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 59 states. [2020-10-14 23:54:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:33,684 INFO L93 Difference]: Finished difference Result 298 states and 354 transitions. [2020-10-14 23:54:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 23:54:33,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 124 [2020-10-14 23:54:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:33,687 INFO L225 Difference]: With dead ends: 298 [2020-10-14 23:54:33,687 INFO L226 Difference]: Without dead ends: 292 [2020-10-14 23:54:33,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:54:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-14 23:54:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 127. [2020-10-14 23:54:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 23:54:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-14 23:54:33,691 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2020-10-14 23:54:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:33,692 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-14 23:54:33,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 23:54:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-14 23:54:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 23:54:33,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:33,693 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:33,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:54:33,693 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 903761555, now seen corresponding path program 55 times [2020-10-14 23:54:33,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:33,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613297493] [2020-10-14 23:54:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:33,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:37,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3610 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 23:54:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:37,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-14 23:54:37,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:39,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:39,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:39,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:39,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613297493] [2020-10-14 23:54:39,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:39,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 23:54:39,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492818143] [2020-10-14 23:54:39,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 23:54:39,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 23:54:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:54:39,234 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 60 states. [2020-10-14 23:54:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:40,000 INFO L93 Difference]: Finished difference Result 303 states and 360 transitions. [2020-10-14 23:54:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 23:54:40,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 126 [2020-10-14 23:54:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:40,002 INFO L225 Difference]: With dead ends: 303 [2020-10-14 23:54:40,003 INFO L226 Difference]: Without dead ends: 297 [2020-10-14 23:54:40,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:54:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-14 23:54:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 129. [2020-10-14 23:54:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:54:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-14 23:54:40,007 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2020-10-14 23:54:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:40,007 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-14 23:54:40,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 23:54:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-14 23:54:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 23:54:40,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:40,008 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:40,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:54:40,009 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash 606330414, now seen corresponding path program 56 times [2020-10-14 23:54:40,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:40,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031061882] [2020-10-14 23:54:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:43,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:43,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 23:54:43,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:43,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3015 [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 23:54:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:44,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:44,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:44,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:44,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:44,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:44,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031061882] [2020-10-14 23:54:44,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:44,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 23:54:44,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358908677] [2020-10-14 23:54:44,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 23:54:44,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:44,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 23:54:44,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:54:44,993 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 61 states. [2020-10-14 23:54:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:45,693 INFO L93 Difference]: Finished difference Result 3612 states and 3670 transitions. [2020-10-14 23:54:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 23:54:45,694 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 128 [2020-10-14 23:54:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:45,708 INFO L225 Difference]: With dead ends: 3612 [2020-10-14 23:54:45,708 INFO L226 Difference]: Without dead ends: 3606 [2020-10-14 23:54:45,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:54:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2020-10-14 23:54:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 134. [2020-10-14 23:54:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 23:54:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-14 23:54:45,728 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2020-10-14 23:54:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:45,728 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-14 23:54:45,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 23:54:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-14 23:54:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 23:54:45,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:45,729 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:45,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:54:45,730 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1757154551, now seen corresponding path program 57 times [2020-10-14 23:54:45,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:45,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788516320] [2020-10-14 23:54:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:45,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:48,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3211 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:54:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-14 23:54:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:51,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:51,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:51,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:51,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788516320] [2020-10-14 23:54:51,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:51,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 23:54:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163259842] [2020-10-14 23:54:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 23:54:51,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 23:54:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:54:51,036 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 62 states. [2020-10-14 23:54:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:51,846 INFO L93 Difference]: Finished difference Result 429 states and 489 transitions. [2020-10-14 23:54:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 23:54:51,847 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 130 [2020-10-14 23:54:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:51,850 INFO L225 Difference]: With dead ends: 429 [2020-10-14 23:54:51,850 INFO L226 Difference]: Without dead ends: 421 [2020-10-14 23:54:51,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:54:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-14 23:54:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 133. [2020-10-14 23:54:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 23:54:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-14 23:54:51,855 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2020-10-14 23:54:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:51,856 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-14 23:54:51,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 23:54:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-14 23:54:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 23:54:51,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:51,857 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:51,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:54:51,857 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1028506332, now seen corresponding path program 58 times [2020-10-14 23:54:51,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:51,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947991525] [2020-10-14 23:54:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:51,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:55,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:55,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 23:54:55,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:54:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4099 [2020-10-14 23:54:55,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:55,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 23:54:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:54:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 23:54:55,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:54:58,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:54:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:58,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:58,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:54:58,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:54:58,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:54:58,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:54:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:54:58,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947991525] [2020-10-14 23:54:58,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:54:58,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 23:54:58,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908294876] [2020-10-14 23:54:58,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 23:54:58,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:54:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 23:54:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:54:58,114 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 63 states. [2020-10-14 23:54:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:54:58,809 INFO L93 Difference]: Finished difference Result 3856 states and 3916 transitions. [2020-10-14 23:54:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 23:54:58,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 132 [2020-10-14 23:54:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:54:58,817 INFO L225 Difference]: With dead ends: 3856 [2020-10-14 23:54:58,817 INFO L226 Difference]: Without dead ends: 3850 [2020-10-14 23:54:58,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:54:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-10-14 23:54:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 138. [2020-10-14 23:54:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 23:54:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-14 23:54:58,832 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 132 [2020-10-14 23:54:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:54:58,832 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-14 23:54:58,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 23:54:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-14 23:54:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 23:54:58,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:54:58,833 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:54:58,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:54:58,833 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:54:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:54:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -877237121, now seen corresponding path program 59 times [2020-10-14 23:54:58,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:54:58,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534795999] [2020-10-14 23:54:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:54:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:54:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:54:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:02,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:02,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3445 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 23:55:02,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:04,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:04,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:04,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:04,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534795999] [2020-10-14 23:55:04,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:04,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 23:55:04,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456869048] [2020-10-14 23:55:04,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 23:55:04,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 23:55:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:55:04,486 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 64 states. [2020-10-14 23:55:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:05,312 INFO L93 Difference]: Finished difference Result 3861 states and 3922 transitions. [2020-10-14 23:55:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 23:55:05,312 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 134 [2020-10-14 23:55:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:05,320 INFO L225 Difference]: With dead ends: 3861 [2020-10-14 23:55:05,320 INFO L226 Difference]: Without dead ends: 3855 [2020-10-14 23:55:05,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:55:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2020-10-14 23:55:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 143. [2020-10-14 23:55:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:55:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-14 23:55:05,343 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 134 [2020-10-14 23:55:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:05,344 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-14 23:55:05,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 23:55:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-14 23:55:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 23:55:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:05,345 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:05,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:55:05,346 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1536413414, now seen corresponding path program 60 times [2020-10-14 23:55:05,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:05,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305378895] [2020-10-14 23:55:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:09,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4281 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:55:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 23:55:09,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:11,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:11,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:11,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:11,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:11,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:11,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305378895] [2020-10-14 23:55:11,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:11,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 23:55:11,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509237849] [2020-10-14 23:55:11,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 23:55:11,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 23:55:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:55:11,946 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 65 states. [2020-10-14 23:55:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:12,912 INFO L93 Difference]: Finished difference Result 570 states and 634 transitions. [2020-10-14 23:55:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 23:55:12,913 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 136 [2020-10-14 23:55:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:12,915 INFO L225 Difference]: With dead ends: 570 [2020-10-14 23:55:12,915 INFO L226 Difference]: Without dead ends: 560 [2020-10-14 23:55:12,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:55:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-14 23:55:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 139. [2020-10-14 23:55:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 23:55:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-14 23:55:12,922 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2020-10-14 23:55:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:12,922 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-14 23:55:12,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 23:55:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-14 23:55:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 23:55:12,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:12,924 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:12,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:55:12,924 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:12,924 INFO L82 PathProgramCache]: Analyzing trace with hash 650328821, now seen corresponding path program 61 times [2020-10-14 23:55:12,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:12,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127388380] [2020-10-14 23:55:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:16,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3263 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 23:55:16,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:18,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:18,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:18,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:18,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:18,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:18,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127388380] [2020-10-14 23:55:18,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:18,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 23:55:18,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044443109] [2020-10-14 23:55:18,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 23:55:18,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 23:55:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:55:18,603 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 66 states. [2020-10-14 23:55:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:19,348 INFO L93 Difference]: Finished difference Result 4237 states and 4300 transitions. [2020-10-14 23:55:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 23:55:19,348 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 138 [2020-10-14 23:55:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:19,357 INFO L225 Difference]: With dead ends: 4237 [2020-10-14 23:55:19,357 INFO L226 Difference]: Without dead ends: 4231 [2020-10-14 23:55:19,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:55:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2020-10-14 23:55:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 144. [2020-10-14 23:55:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 23:55:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-14 23:55:19,379 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 138 [2020-10-14 23:55:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:19,380 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-14 23:55:19,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 23:55:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-14 23:55:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 23:55:19,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:19,381 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:19,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:55:19,381 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1870608912, now seen corresponding path program 62 times [2020-10-14 23:55:19,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:19,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386840049] [2020-10-14 23:55:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:19,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:24,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:24,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 23:55:24,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4670 [2020-10-14 23:55:24,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:24,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 23:55:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:55:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-14 23:55:24,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:26,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:26,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:26,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:26,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386840049] [2020-10-14 23:55:26,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:26,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 23:55:26,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235795510] [2020-10-14 23:55:26,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 23:55:26,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 23:55:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:55:26,617 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 67 states. [2020-10-14 23:55:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:27,697 INFO L93 Difference]: Finished difference Result 464 states and 529 transitions. [2020-10-14 23:55:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 23:55:27,698 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 140 [2020-10-14 23:55:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:27,700 INFO L225 Difference]: With dead ends: 464 [2020-10-14 23:55:27,700 INFO L226 Difference]: Without dead ends: 456 [2020-10-14 23:55:27,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:55:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-14 23:55:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 143. [2020-10-14 23:55:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:55:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-10-14 23:55:27,705 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2020-10-14 23:55:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:27,705 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-10-14 23:55:27,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 23:55:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-10-14 23:55:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 23:55:27,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:27,707 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:27,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:55:27,707 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2033704555, now seen corresponding path program 63 times [2020-10-14 23:55:27,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:27,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012822284] [2020-10-14 23:55:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:31,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:31,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 23:55:31,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3914 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 23:55:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:34,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:34,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:34,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:34,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:34,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:34,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:34,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:34,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:34,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:55:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:34,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012822284] [2020-10-14 23:55:34,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:34,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 23:55:34,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803008194] [2020-10-14 23:55:34,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 23:55:34,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 23:55:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:55:34,191 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 68 states. [2020-10-14 23:55:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:35,272 INFO L93 Difference]: Finished difference Result 4501 states and 4566 transitions. [2020-10-14 23:55:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 23:55:35,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 142 [2020-10-14 23:55:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:35,281 INFO L225 Difference]: With dead ends: 4501 [2020-10-14 23:55:35,281 INFO L226 Difference]: Without dead ends: 4495 [2020-10-14 23:55:35,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:55:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2020-10-14 23:55:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 148. [2020-10-14 23:55:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 23:55:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-10-14 23:55:35,306 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 142 [2020-10-14 23:55:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:35,306 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-10-14 23:55:35,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 23:55:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-10-14 23:55:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 23:55:35,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:35,308 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:35,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:55:35,308 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash -145172474, now seen corresponding path program 64 times [2020-10-14 23:55:35,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:35,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023691388] [2020-10-14 23:55:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:35,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:40,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:40,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4895 [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 23:55:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 23:55:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:42,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:42,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:42,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:55:42,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:42,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:42,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:42,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023691388] [2020-10-14 23:55:42,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:42,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-14 23:55:42,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154018574] [2020-10-14 23:55:42,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-14 23:55:42,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-14 23:55:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:55:42,885 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 69 states. [2020-10-14 23:55:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:44,014 INFO L93 Difference]: Finished difference Result 4506 states and 4572 transitions. [2020-10-14 23:55:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 23:55:44,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 144 [2020-10-14 23:55:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:44,021 INFO L225 Difference]: With dead ends: 4506 [2020-10-14 23:55:44,021 INFO L226 Difference]: Without dead ends: 4500 [2020-10-14 23:55:44,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:55:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2020-10-14 23:55:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 153. [2020-10-14 23:55:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 23:55:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-10-14 23:55:44,045 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 144 [2020-10-14 23:55:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:44,045 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-10-14 23:55:44,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-14 23:55:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-10-14 23:55:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 23:55:44,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:44,047 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:44,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:55:44,047 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1898043105, now seen corresponding path program 65 times [2020-10-14 23:55:44,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:44,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067945232] [2020-10-14 23:55:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:49,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:49,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 23:55:49,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:49,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:55:49,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:49,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:49,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-14 23:55:49,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:49,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 23:55:49,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:55:51,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:55:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:51,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:51,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:51,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:55:51,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:55:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:55:51,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:51,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:55:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:55:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:55:51,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:55:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:55:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067945232] [2020-10-14 23:55:51,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:55:51,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 23:55:51,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625568471] [2020-10-14 23:55:51,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 23:55:51,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:55:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 23:55:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:55:51,806 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 70 states. [2020-10-14 23:55:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:55:52,939 INFO L93 Difference]: Finished difference Result 4511 states and 4578 transitions. [2020-10-14 23:55:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-14 23:55:52,940 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 146 [2020-10-14 23:55:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:55:52,944 INFO L225 Difference]: With dead ends: 4511 [2020-10-14 23:55:52,945 INFO L226 Difference]: Without dead ends: 4505 [2020-10-14 23:55:52,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:55:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2020-10-14 23:55:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 158. [2020-10-14 23:55:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 23:55:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-14 23:55:52,962 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 146 [2020-10-14 23:55:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:55:52,962 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-14 23:55:52,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 23:55:52,963 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-14 23:55:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 23:55:52,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:55:52,963 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:55:52,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:55:52,963 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:55:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:55:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1666807044, now seen corresponding path program 66 times [2020-10-14 23:55:52,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:55:52,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347953037] [2020-10-14 23:55:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:55:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:55:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:55:57,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4769 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 23:55:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:55:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 23:55:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:00,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:00,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:00,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:00,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347953037] [2020-10-14 23:56:00,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:00,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-14 23:56:00,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273646073] [2020-10-14 23:56:00,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-14 23:56:00,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-14 23:56:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:56:00,626 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 71 states. [2020-10-14 23:56:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:01,572 INFO L93 Difference]: Finished difference Result 4516 states and 4584 transitions. [2020-10-14 23:56:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 23:56:01,572 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 148 [2020-10-14 23:56:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:01,577 INFO L225 Difference]: With dead ends: 4516 [2020-10-14 23:56:01,577 INFO L226 Difference]: Without dead ends: 4510 [2020-10-14 23:56:01,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:56:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-10-14 23:56:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 163. [2020-10-14 23:56:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 23:56:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2020-10-14 23:56:01,595 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 148 [2020-10-14 23:56:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:01,595 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2020-10-14 23:56:01,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-14 23:56:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2020-10-14 23:56:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 23:56:01,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:01,596 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:01,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 23:56:01,596 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash -103898025, now seen corresponding path program 67 times [2020-10-14 23:56:01,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:01,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480944680] [2020-10-14 23:56:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:02,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:06,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:06,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 23:56:06,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:06,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-14 23:56:06,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:09,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:09,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:09,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:09,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:09,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:09,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:09,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:09,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480944680] [2020-10-14 23:56:09,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:09,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 23:56:09,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649861333] [2020-10-14 23:56:09,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 23:56:09,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:09,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 23:56:09,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:56:09,570 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand 72 states. [2020-10-14 23:56:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:10,872 INFO L93 Difference]: Finished difference Result 895 states and 968 transitions. [2020-10-14 23:56:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 23:56:10,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 150 [2020-10-14 23:56:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:10,874 INFO L225 Difference]: With dead ends: 895 [2020-10-14 23:56:10,874 INFO L226 Difference]: Without dead ends: 881 [2020-10-14 23:56:10,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:56:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-14 23:56:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 153. [2020-10-14 23:56:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 23:56:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-14 23:56:10,879 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2020-10-14 23:56:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:10,879 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-14 23:56:10,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-14 23:56:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-14 23:56:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 23:56:10,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:10,880 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:10,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 23:56:10,880 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1386884366, now seen corresponding path program 68 times [2020-10-14 23:56:10,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:10,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813899919] [2020-10-14 23:56:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:15,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4933 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 23:56:15,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:18,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:18,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:18,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:18,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:18,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:18,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:18,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:18,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813899919] [2020-10-14 23:56:18,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:18,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 23:56:18,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581909940] [2020-10-14 23:56:18,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 23:56:18,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:18,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 23:56:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:56:18,778 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 73 states. [2020-10-14 23:56:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:19,887 INFO L93 Difference]: Finished difference Result 5196 states and 5266 transitions. [2020-10-14 23:56:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-14 23:56:19,887 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 152 [2020-10-14 23:56:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:19,893 INFO L225 Difference]: With dead ends: 5196 [2020-10-14 23:56:19,893 INFO L226 Difference]: Without dead ends: 5190 [2020-10-14 23:56:19,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:56:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2020-10-14 23:56:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 158. [2020-10-14 23:56:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 23:56:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-14 23:56:19,909 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2020-10-14 23:56:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:19,909 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-14 23:56:19,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 23:56:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-14 23:56:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 23:56:19,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:19,910 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:19,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 23:56:19,910 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1681144115, now seen corresponding path program 69 times [2020-10-14 23:56:19,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:19,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590892556] [2020-10-14 23:56:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:19,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:24,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4467 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-14 23:56:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:56:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 23:56:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:27,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:27,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:27,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:27,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:27,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:27,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:27,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:27,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590892556] [2020-10-14 23:56:27,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:27,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-14 23:56:27,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339725163] [2020-10-14 23:56:27,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-14 23:56:27,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-14 23:56:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:56:27,421 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 74 states. [2020-10-14 23:56:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:28,591 INFO L93 Difference]: Finished difference Result 5201 states and 5272 transitions. [2020-10-14 23:56:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 23:56:28,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 154 [2020-10-14 23:56:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:28,596 INFO L225 Difference]: With dead ends: 5201 [2020-10-14 23:56:28,596 INFO L226 Difference]: Without dead ends: 5195 [2020-10-14 23:56:28,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:56:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2020-10-14 23:56:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 163. [2020-10-14 23:56:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 23:56:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2020-10-14 23:56:28,613 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 154 [2020-10-14 23:56:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:28,614 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2020-10-14 23:56:28,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-14 23:56:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2020-10-14 23:56:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 23:56:28,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:28,615 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:28,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 23:56:28,615 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash -996921368, now seen corresponding path program 70 times [2020-10-14 23:56:28,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:28,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550228360] [2020-10-14 23:56:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:33,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:56:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-14 23:56:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:36,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:36,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:36,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:36,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:36,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550228360] [2020-10-14 23:56:36,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:36,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-14 23:56:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507380547] [2020-10-14 23:56:36,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-14 23:56:36,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-14 23:56:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:56:36,787 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand 75 states.