/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=NARROWEST --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-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:35,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:35,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:35,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:35,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:35,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:35,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:35,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:35,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:35,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:35,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:35,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:35,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:35,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:35,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:35,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:35,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:35,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:35,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:35,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:35,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:35,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:35,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:35,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:35,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:35,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:35,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:35,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:35,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:35,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:35,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:35,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:36,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:36,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:36,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:36,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:36,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:36,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:36,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:36,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:36,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:36,006 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 [2020-10-13 10:51:36,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:36,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:36,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:36,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:36,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:36,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:36,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:36,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:36,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:36,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:36,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:36,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:36,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:36,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:36,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:36,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:36,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:36,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:36,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:36,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:36,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:36,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:36,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:36,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:36,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:36,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:36,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:36,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:36,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:36,035 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:51:36,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:36,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:36,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:36,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:36,388 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:36,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-10-13 10:51:36,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf86706f9/a5e93451c8c748af89e65324de6846cc/FLAGefa9214ca [2020-10-13 10:51:36,964 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:36,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-10-13 10:51:36,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf86706f9/a5e93451c8c748af89e65324de6846cc/FLAGefa9214ca [2020-10-13 10:51:37,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf86706f9/a5e93451c8c748af89e65324de6846cc [2020-10-13 10:51:37,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:37,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:37,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:37,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:37,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:37,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd8ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37, skipping insertion in model container [2020-10-13 10:51:37,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:37,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:37,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:37,563 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:37,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:37,608 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:37,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37 WrapperNode [2020-10-13 10:51:37,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:37,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:37,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:37,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:37,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (1/1) ... [2020-10-13 10:51:37,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:37,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:37,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:37,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:37,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (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 [2020-10-13 10:51:37,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:37,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:37,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:37,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:38,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:38,048 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:51:38,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:38 BoogieIcfgContainer [2020-10-13 10:51:38,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:38,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:38,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:38,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:38,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:37" (1/3) ... [2020-10-13 10:51:38,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581248c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:38, skipping insertion in model container [2020-10-13 10:51:38,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:37" (2/3) ... [2020-10-13 10:51:38,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581248c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:38, skipping insertion in model container [2020-10-13 10:51:38,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:38" (3/3) ... [2020-10-13 10:51:38,061 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2020-10-13 10:51:38,072 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:38,080 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:38,096 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:38,127 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:38,128 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:38,128 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:38,128 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:38,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:38,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:38,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:38,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 10:51:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:38,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:38,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:38,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1868635620, now seen corresponding path program 1 times [2020-10-13 10:51:38,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:38,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936702676] [2020-10-13 10:51:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:39,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:51:39,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-13 10:51:39,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:51:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:51:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:39,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:39,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:39,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:39,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:39,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:39,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936702676] [2020-10-13 10:51:39,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:39,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:51:39,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15371974] [2020-10-13 10:51:39,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:39,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:39,198 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-13 10:51:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:39,523 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2020-10-13 10:51:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:39,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 10:51:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:39,537 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:51:39,537 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:39,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2020-10-13 10:51:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:51:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2020-10-13 10:51:39,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 27 [2020-10-13 10:51:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:39,587 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2020-10-13 10:51:39,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2020-10-13 10:51:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:39,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:39,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:39,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:39,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1869201649, now seen corresponding path program 1 times [2020-10-13 10:51:39,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:39,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378734872] [2020-10-13 10:51:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-13 10:51:39,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:51:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:51:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:39,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:39,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:39,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:39,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:39,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:39,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:39,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378734872] [2020-10-13 10:51:39,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:39,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:51:39,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068775911] [2020-10-13 10:51:39,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:39,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:39,988 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 4 states. [2020-10-13 10:51:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,149 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2020-10-13 10:51:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:40,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 10:51:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,151 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:51:40,151 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:40,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:51:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:51:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-13 10:51:40,166 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2020-10-13 10:51:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,167 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-13 10:51:40,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-13 10:51:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:40,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:40,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 306167739, now seen corresponding path program 1 times [2020-10-13 10:51:40,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403051190] [2020-10-13 10:51:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-13 10:51:40,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:51:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:40,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:40,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:40,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403051190] [2020-10-13 10:51:40,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:40,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:40,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843539791] [2020-10-13 10:51:40,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:40,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,376 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 5 states. [2020-10-13 10:51:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,478 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-13 10:51:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:40,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 10:51:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,480 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:51:40,480 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:51:40,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:51:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:51:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:51:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 10:51:40,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-13 10:51:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,490 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 10:51:40,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 10:51:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:40,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:40,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1148706060, now seen corresponding path program 1 times [2020-10-13 10:51:40,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086169132] [2020-10-13 10:51:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:40,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-13 10:51:40,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:40,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:40,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:40,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:51:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:40,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086169132] [2020-10-13 10:51:40,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:40,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:51:40,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052990327] [2020-10-13 10:51:40,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:40,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:40,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:40,749 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 6 states. [2020-10-13 10:51:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,938 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-13 10:51:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:40,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 10:51:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,939 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:51:40,940 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:51:40,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:51:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:51:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:51:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-13 10:51:40,956 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-13 10:51:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,956 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-13 10:51:40,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-13 10:51:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:40,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:40,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1052595016, now seen corresponding path program 1 times [2020-10-13 10:51:40,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119572807] [2020-10-13 10:51:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:41,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-13 10:51:41,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:51:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:41,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:41,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119572807] [2020-10-13 10:51:41,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:41,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:51:41,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074581204] [2020-10-13 10:51:41,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:41,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:41,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:41,240 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-13 10:51:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,436 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-13 10:51:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:41,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 10:51:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,438 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:51:41,438 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:51:41,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:51:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 10:51:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:51:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 10:51:41,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-13 10:51:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,445 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 10:51:41,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 10:51:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:41,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:41,447 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1229090956, now seen corresponding path program 1 times [2020-10-13 10:51:41,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101349446] [2020-10-13 10:51:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:41,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:51:41,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:41,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:51:41,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:51:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:41,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:41,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101349446] [2020-10-13 10:51:41,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:41,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:51:41,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917504791] [2020-10-13 10:51:41,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:41,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:41,640 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-13 10:51:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,801 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-13 10:51:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:41,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 10:51:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,803 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:51:41,803 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:51:41,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:51:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 10:51:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:51:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 10:51:41,810 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2020-10-13 10:51:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,811 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 10:51:41,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 10:51:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:41,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:41,813 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2026649187, now seen corresponding path program 1 times [2020-10-13 10:51:41,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655058168] [2020-10-13 10:51:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:41,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 10:51:41,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:41,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:51:41,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:51:41,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:42,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:42,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:42,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655058168] [2020-10-13 10:51:42,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:42,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:51:42,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136466508] [2020-10-13 10:51:42,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:42,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:42,022 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-10-13 10:51:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,205 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 10:51:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:42,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 10:51:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,207 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:51:42,207 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:51:42,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:51:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 10:51:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:51:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-13 10:51:42,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 27 [2020-10-13 10:51:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,215 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-13 10:51:42,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-13 10:51:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:51:42,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:42,217 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1982145533, now seen corresponding path program 1 times [2020-10-13 10:51:42,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226325591] [2020-10-13 10:51:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:51:42,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:42,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 10:51:42,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:51:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:51:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:42,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:42,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:42,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226325591] [2020-10-13 10:51:42,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:42,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835314074] [2020-10-13 10:51:42,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:42,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:42,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:42,627 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 9 states. [2020-10-13 10:51:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,823 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-13 10:51:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:42,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-13 10:51:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,825 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:51:42,825 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:51:42,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:51:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 10:51:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:51:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 10:51:42,833 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 29 [2020-10-13 10:51:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,833 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 10:51:42,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 10:51:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:51:42,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:42,835 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2131160297, now seen corresponding path program 2 times [2020-10-13 10:51:42,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481554731] [2020-10-13 10:51:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:51:43,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:51:43,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:43,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:43,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:51:43,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481554731] [2020-10-13 10:51:43,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:43,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 10:51:43,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783291414] [2020-10-13 10:51:43,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:43,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:43,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:43,393 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 9 states. [2020-10-13 10:51:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,584 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-13 10:51:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:43,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-13 10:51:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,586 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:51:43,586 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:51:43,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:51:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:51:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:51:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 10:51:43,593 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-10-13 10:51:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,593 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 10:51:43,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 10:51:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:51:43,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:51:43,595 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,595 INFO L82 PathProgramCache]: Analyzing trace with hash -106812414, now seen corresponding path program 1 times [2020-10-13 10:51:43,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842066892] [2020-10-13 10:51:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:51:43,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-13 10:51:43,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:51:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:51:43,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:43,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:43,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:43,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842066892] [2020-10-13 10:51:43,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:43,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118008911] [2020-10-13 10:51:43,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:43,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:43,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:43,938 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2020-10-13 10:51:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,214 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-13 10:51:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:44,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:51:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,216 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:51:44,216 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:51:44,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:51:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 10:51:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:51:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 10:51:44,222 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 33 [2020-10-13 10:51:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,222 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 10:51:44,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 10:51:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:51:44,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,224 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:51:44,225 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,225 INFO L82 PathProgramCache]: Analyzing trace with hash 424947164, now seen corresponding path program 2 times [2020-10-13 10:51:44,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123139220] [2020-10-13 10:51:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:51:44,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:44,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-13 10:51:44,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:51:44,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:44,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:44,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:44,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:44,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:51:44,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123139220] [2020-10-13 10:51:44,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:44,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 10:51:44,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024291153] [2020-10-13 10:51:44,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:44,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:44,659 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-13 10:51:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,824 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-13 10:51:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:44,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 10:51:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,825 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:51:44,825 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:51:44,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:51:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:51:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:51:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-13 10:51:44,831 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-13 10:51:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,832 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-13 10:51:44,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-13 10:51:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:51:44,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,833 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:51:44,833 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 575909501, now seen corresponding path program 1 times [2020-10-13 10:51:44,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443185712] [2020-10-13 10:51:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:51:45,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:45,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-13 10:51:45,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:51:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:51:45,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:45,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:45,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:45,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:45,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:45,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443185712] [2020-10-13 10:51:45,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:45,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:45,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580767612] [2020-10-13 10:51:45,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:45,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:45,579 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-10-13 10:51:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:45,777 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-13 10:51:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:45,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 10:51:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:45,779 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:51:45,779 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:45,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 10:51:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:51:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 10:51:45,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-13 10:51:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:45,785 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 10:51:45,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 10:51:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:51:45,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:45,786 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:45,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:51:45,786 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash -609288809, now seen corresponding path program 2 times [2020-10-13 10:51:45,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:45,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224691056] [2020-10-13 10:51:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:51:46,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-13 10:51:46,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:51:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:46,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:46,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:46,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:51:46,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224691056] [2020-10-13 10:51:46,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:46,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 10:51:46,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022227858] [2020-10-13 10:51:46,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:46,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:46,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:46,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:46,319 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 11 states. [2020-10-13 10:51:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:46,488 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-13 10:51:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:46,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 10:51:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:46,489 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:51:46,489 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:51:46,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:51:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:51:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:51:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 10:51:46,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2020-10-13 10:51:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:46,496 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 10:51:46,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 10:51:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:51:46,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:46,497 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:46,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:51:46,498 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1847436654, now seen corresponding path program 1 times [2020-10-13 10:51:46,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:46,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779139929] [2020-10-13 10:51:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:47,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:51:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-13 10:51:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:51:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:51:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:47,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:47,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:47,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:47,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779139929] [2020-10-13 10:51:47,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:47,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:51:47,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440171694] [2020-10-13 10:51:47,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:47,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:47,541 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-10-13 10:51:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:47,754 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 10:51:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:47,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 10:51:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:47,755 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:51:47,755 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:47,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:51:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 10:51:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:51:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-13 10:51:47,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2020-10-13 10:51:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:47,764 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-13 10:51:47,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-13 10:51:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:51:47,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:47,765 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:47,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:51:47,766 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1557593160, now seen corresponding path program 2 times [2020-10-13 10:51:47,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:47,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686335991] [2020-10-13 10:51:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:51:48,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:48,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-13 10:51:48,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:51:48,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:48,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:48,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:48,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:51:48,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686335991] [2020-10-13 10:51:48,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:48,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 10:51:48,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66260032] [2020-10-13 10:51:48,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:48,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:48,347 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-13 10:51:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:48,601 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 10:51:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:48,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 10:51:48,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:48,602 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:51:48,602 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:51:48,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:51:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:51:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:51:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:51:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 10:51:48,615 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-13 10:51:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:48,615 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 10:51:48,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 10:51:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:51:48,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:48,616 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:48,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:51:48,617 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2035733803, now seen corresponding path program 1 times [2020-10-13 10:51:48,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:48,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154842555] [2020-10-13 10:51:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:51:49,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:49,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-13 10:51:49,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:51:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:51:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:49,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:49,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:49,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:49,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:49,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:49,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:49,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154842555] [2020-10-13 10:51:49,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:49,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:51:49,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462281964] [2020-10-13 10:51:49,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:49,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:49,306 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-13 10:51:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:49,644 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-13 10:51:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:49,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-13 10:51:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:49,646 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:51:49,646 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:51:49,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:51:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:51:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 10:51:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:51:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 10:51:49,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-13 10:51:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:49,659 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 10:51:49,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 10:51:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:51:49,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:49,662 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:49,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:51:49,662 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2137603089, now seen corresponding path program 2 times [2020-10-13 10:51:49,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:49,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576567455] [2020-10-13 10:51:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:51:50,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:50,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-13 10:51:50,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:51:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:50,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:51:50,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576567455] [2020-10-13 10:51:50,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:50,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 10:51:50,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713920561] [2020-10-13 10:51:50,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:50,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:50,405 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2020-10-13 10:51:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:50,639 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 10:51:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:50,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-13 10:51:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:50,641 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:51:50,641 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:51:50,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:51:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:51:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 10:51:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:51:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 10:51:50,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-13 10:51:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:50,647 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 10:51:50,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 10:51:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:51:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:50,648 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:50,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:51:50,648 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1048718868, now seen corresponding path program 1 times [2020-10-13 10:51:50,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:50,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801807413] [2020-10-13 10:51:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:51,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:51:51,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:51,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-13 10:51:51,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:51,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:51,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 10:51:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:51:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:51,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:51,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:51,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:51,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:51,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:51,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801807413] [2020-10-13 10:51:51,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:51,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:51:51,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499475074] [2020-10-13 10:51:51,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:51:51,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:51:51,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:51,474 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-10-13 10:51:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:51,709 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-13 10:51:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:51:51,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-13 10:51:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:51,711 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:51:51,711 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:51:51,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:51:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:51:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 10:51:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:51:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 10:51:51,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-13 10:51:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:51,718 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 10:51:51,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:51:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 10:51:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:51:51,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:51,719 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:51,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:51:51,721 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1490944326, now seen corresponding path program 2 times [2020-10-13 10:51:51,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:51,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279754980] [2020-10-13 10:51:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:53,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:53,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:51:53,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:53,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:53,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:53,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:53,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:51:53,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279754980] [2020-10-13 10:51:53,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:53,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:51:53,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528403229] [2020-10-13 10:51:53,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:51:53,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:51:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:53,142 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 14 states. [2020-10-13 10:51:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:53,373 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-13 10:51:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:51:53,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 10:51:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:53,374 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:51:53,374 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:51:53,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:51:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:51:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:51:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:51:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 10:51:53,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-13 10:51:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:53,379 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 10:51:53,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:51:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 10:51:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:51:53,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:53,381 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:53,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:51:53,381 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:53,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1822177085, now seen corresponding path program 3 times [2020-10-13 10:51:53,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:53,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338708624] [2020-10-13 10:51:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:51:54,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-13 10:51:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:51:54,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 10:51:54,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:51:54,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:54,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 46 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:51:54,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338708624] [2020-10-13 10:51:54,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:54,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:54,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143142560] [2020-10-13 10:51:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:54,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:54,198 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 15 states. [2020-10-13 10:51:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:54,460 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-10-13 10:51:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:54,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-13 10:51:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:54,461 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:51:54,461 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:51:54,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:51:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:51:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 10:51:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:51:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 10:51:54,466 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-13 10:51:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:54,467 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 10:51:54,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 10:51:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:51:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:54,468 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:54,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:51:54,468 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1226939997, now seen corresponding path program 4 times [2020-10-13 10:51:54,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:54,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609235153] [2020-10-13 10:51:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:55,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:55,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:51:55,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 10:51:55,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:51:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:55,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:55,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:55,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:55,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:55,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:55,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:55,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 10:51:55,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609235153] [2020-10-13 10:51:55,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:55,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:55,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102597210] [2020-10-13 10:51:55,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:55,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:55,409 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 15 states. [2020-10-13 10:51:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:55,696 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 10:51:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:55,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-13 10:51:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:55,697 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:51:55,698 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:51:55,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:51:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:51:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 10:51:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:51:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 10:51:55,703 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-13 10:51:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:55,703 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 10:51:55,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 10:51:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:51:55,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:55,704 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:55,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:51:55,705 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1269997734, now seen corresponding path program 5 times [2020-10-13 10:51:55,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:55,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156722310] [2020-10-13 10:51:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:51:56,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:56,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-13 10:51:56,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:56,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:51:56,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:51:56,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:56,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:56,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 75 proven. 144 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:51:56,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156722310] [2020-10-13 10:51:56,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:56,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:51:56,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476126145] [2020-10-13 10:51:56,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:51:56,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:51:56,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:51:56,610 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 16 states. [2020-10-13 10:51:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:56,863 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-13 10:51:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:51:56,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-13 10:51:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:56,866 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:51:56,866 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:51:56,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:51:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:51:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 10:51:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:51:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 10:51:56,870 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-13 10:51:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:56,871 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 10:51:56,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:51:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 10:51:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:51:56,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:56,872 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:56,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:51:56,872 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -704648396, now seen corresponding path program 6 times [2020-10-13 10:51:56,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:56,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666917686] [2020-10-13 10:51:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:51:57,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:51:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:57,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:57,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:57,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:57,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 10:51:57,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666917686] [2020-10-13 10:51:57,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:57,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:51:57,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914311696] [2020-10-13 10:51:57,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:51:57,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:51:57,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:51:57,628 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 16 states. [2020-10-13 10:51:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:57,961 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 10:51:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:51:57,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-13 10:51:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:57,962 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:51:57,962 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:51:57,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:51:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:51:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 10:51:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:51:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 10:51:57,968 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-13 10:51:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:57,969 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 10:51:57,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:51:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 10:51:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:51:57,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:57,970 INFO L422 BasicCegarLoop]: trace histogram [17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:57,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:51:57,970 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:57,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1396237745, now seen corresponding path program 7 times [2020-10-13 10:51:57,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:57,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519271000] [2020-10-13 10:51:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:58,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 10:51:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:51:58,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:58,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:58,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:58,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 108 proven. 169 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:51:58,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519271000] [2020-10-13 10:51:58,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:58,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:51:58,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852719073] [2020-10-13 10:51:58,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:51:58,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:51:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:58,942 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 17 states. [2020-10-13 10:51:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:59,331 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-10-13 10:51:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:51:59,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-13 10:51:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:59,333 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:51:59,333 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:51:59,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:51:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:51:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 10:51:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:51:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 10:51:59,339 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-10-13 10:51:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:59,340 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 10:51:59,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:51:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 10:51:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:51:59,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:59,341 INFO L422 BasicCegarLoop]: trace histogram [18, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:59,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:51:59,342 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1747138507, now seen corresponding path program 8 times [2020-10-13 10:51:59,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:59,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022973172] [2020-10-13 10:51:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:59,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:00,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:52:00,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:00,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:00,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:00,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 135 proven. 20 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 10:52:00,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022973172] [2020-10-13 10:52:00,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:00,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:52:00,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666475131] [2020-10-13 10:52:00,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:52:00,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:52:00,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:00,636 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 17 states. [2020-10-13 10:52:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:00,936 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-13 10:52:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:52:00,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-10-13 10:52:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:00,937 INFO L225 Difference]: With dead ends: 96 [2020-10-13 10:52:00,937 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:52:00,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:52:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:52:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 10:52:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:52:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 10:52:00,942 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-10-13 10:52:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:00,942 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 10:52:00,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:52:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 10:52:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:52:00,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:00,943 INFO L422 BasicCegarLoop]: trace histogram [19, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:00,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:52:00,943 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1395698632, now seen corresponding path program 9 times [2020-10-13 10:52:00,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:00,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198565914] [2020-10-13 10:52:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 10:52:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:52:02,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:02,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 145 proven. 196 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:52:02,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198565914] [2020-10-13 10:52:02,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:02,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:02,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717529260] [2020-10-13 10:52:02,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:02,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:02,220 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 18 states. [2020-10-13 10:52:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:02,580 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-13 10:52:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:02,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-10-13 10:52:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:02,581 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:52:02,581 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:52:02,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:52:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:52:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 10:52:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:52:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 10:52:02,588 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-13 10:52:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:02,588 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 10:52:02,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 10:52:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:52:02,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:02,589 INFO L422 BasicCegarLoop]: trace histogram [20, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:02,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:52:02,590 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:02,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1229050914, now seen corresponding path program 10 times [2020-10-13 10:52:02,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:02,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223767277] [2020-10-13 10:52:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:03,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:52:03,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:03,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:03,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:03,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:03,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:03,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:03,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:03,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:03,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 30 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 10:52:03,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223767277] [2020-10-13 10:52:03,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:03,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:03,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796873219] [2020-10-13 10:52:03,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:03,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:03,877 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 18 states. [2020-10-13 10:52:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:04,239 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-13 10:52:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:04,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-13 10:52:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:04,241 INFO L225 Difference]: With dead ends: 102 [2020-10-13 10:52:04,241 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:52:04,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:52:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:52:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 10:52:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:52:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 10:52:04,250 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-10-13 10:52:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:04,251 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 10:52:04,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 10:52:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:52:04,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:04,253 INFO L422 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:04,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:52:04,253 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1212875167, now seen corresponding path program 11 times [2020-10-13 10:52:04,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:04,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452547625] [2020-10-13 10:52:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:05,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 10:52:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:52:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:05,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 186 proven. 225 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:52:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452547625] [2020-10-13 10:52:05,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:05,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:05,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000684055] [2020-10-13 10:52:05,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:05,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:05,406 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 19 states. [2020-10-13 10:52:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:05,800 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-13 10:52:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:05,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-10-13 10:52:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:05,802 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:52:05,803 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:52:05,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:52:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:52:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 10:52:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:52:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 10:52:05,810 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-13 10:52:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:05,811 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 10:52:05,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 10:52:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:52:05,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:05,812 INFO L422 BasicCegarLoop]: trace histogram [22, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:05,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:52:05,812 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:05,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1629360185, now seen corresponding path program 12 times [2020-10-13 10:52:05,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:05,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552415277] [2020-10-13 10:52:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:52:06,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:06,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:06,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:06,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 217 proven. 42 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 10:52:06,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552415277] [2020-10-13 10:52:06,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:06,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:06,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315418131] [2020-10-13 10:52:06,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:06,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:06,926 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 19 states. [2020-10-13 10:52:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:07,314 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-13 10:52:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:07,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-13 10:52:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:07,316 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:52:07,316 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:52:07,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:52:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:52:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 10:52:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:52:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 10:52:07,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-10-13 10:52:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:07,324 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 10:52:07,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 10:52:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:52:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:07,330 INFO L422 BasicCegarLoop]: trace histogram [23, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:07,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:52:07,330 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash 883570486, now seen corresponding path program 13 times [2020-10-13 10:52:07,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:07,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730719183] [2020-10-13 10:52:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:08,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:52:08,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-13 10:52:08,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 10:52:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:52:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:09,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:09,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:09,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:09,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 231 proven. 256 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:52:09,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730719183] [2020-10-13 10:52:09,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:09,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:09,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428161451] [2020-10-13 10:52:09,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:09,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:09,139 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 20 states. [2020-10-13 10:52:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:09,559 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-10-13 10:52:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:09,559 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-10-13 10:52:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:09,561 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:52:09,561 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:52:09,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:52:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:52:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 10:52:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:52:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 10:52:09,567 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-10-13 10:52:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:09,568 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 10:52:09,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 10:52:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:52:09,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:09,569 INFO L422 BasicCegarLoop]: trace histogram [24, 17, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:09,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:52:09,569 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1299825648, now seen corresponding path program 14 times [2020-10-13 10:52:09,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:09,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935482664] [2020-10-13 10:52:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:10,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:52:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:10,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:10,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:10,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:10,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:10,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 264 proven. 56 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 10:52:10,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935482664] [2020-10-13 10:52:10,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:10,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:10,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487663305] [2020-10-13 10:52:10,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:10,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:10,972 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 20 states. [2020-10-13 10:52:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:11,416 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-13 10:52:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:11,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-13 10:52:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:11,418 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:52:11,418 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:52:11,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:52:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:52:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 10:52:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 10:52:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 10:52:11,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-13 10:52:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:11,424 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 10:52:11,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 10:52:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:52:11,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:11,425 INFO L422 BasicCegarLoop]: trace histogram [25, 17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:11,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:52:11,425 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash 92052621, now seen corresponding path program 15 times [2020-10-13 10:52:11,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:11,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746396423] [2020-10-13 10:52:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2319 [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 10:52:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:52:13,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:13,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:13,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:13,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:13,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:13,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 280 proven. 289 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:52:13,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746396423] [2020-10-13 10:52:13,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:13,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:13,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88253519] [2020-10-13 10:52:13,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:13,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:13,982 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 21 states. [2020-10-13 10:52:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:14,414 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-10-13 10:52:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:14,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-13 10:52:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:14,416 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:52:14,416 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 10:52:14,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:52:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 10:52:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 10:52:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:52:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 10:52:14,422 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2020-10-13 10:52:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:14,422 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 10:52:14,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 10:52:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:52:14,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:14,423 INFO L422 BasicCegarLoop]: trace histogram [26, 18, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:14,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:52:14,423 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:14,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1739282521, now seen corresponding path program 16 times [2020-10-13 10:52:14,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:14,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045464127] [2020-10-13 10:52:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:14,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:15,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1396 [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:15,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:52:15,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:16,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:16,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:16,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:52:16,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:16,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:52:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 315 proven. 72 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 10:52:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045464127] [2020-10-13 10:52:16,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:16,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:16,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283907402] [2020-10-13 10:52:16,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:16,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:16,074 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 21 states. [2020-10-13 10:52:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:16,516 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-10-13 10:52:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:16,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-10-13 10:52:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:16,518 INFO L225 Difference]: With dead ends: 120 [2020-10-13 10:52:16,518 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:52:16,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:52:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:52:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:52:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:52:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 10:52:16,528 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-13 10:52:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:16,528 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 10:52:16,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 10:52:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:52:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:16,530 INFO L422 BasicCegarLoop]: trace histogram [27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:16,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:52:16,534 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -805535324, now seen corresponding path program 17 times [2020-10-13 10:52:16,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:16,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865944445] [2020-10-13 10:52:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 10:52:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:52:18,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:18,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:18,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:18,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:18,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:18,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:18,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 333 proven. 324 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:52:18,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865944445] [2020-10-13 10:52:18,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:18,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:52:18,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759937600] [2020-10-13 10:52:18,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:52:18,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:18,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:52:18,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:18,436 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 22 states. [2020-10-13 10:52:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:18,929 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-10-13 10:52:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:52:18,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2020-10-13 10:52:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:18,931 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:52:18,931 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:52:18,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:52:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:52:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 10:52:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:52:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-13 10:52:18,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2020-10-13 10:52:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:18,949 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-13 10:52:18,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:52:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-13 10:52:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:52:18,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:18,952 INFO L422 BasicCegarLoop]: trace histogram [28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:18,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:52:18,952 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:18,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1032871170, now seen corresponding path program 18 times [2020-10-13 10:52:18,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:18,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129522752] [2020-10-13 10:52:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:20,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:20,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 10:52:20,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:20,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-10-13 10:52:20,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:52:20,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:21,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:21,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 370 proven. 90 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 10:52:21,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129522752] [2020-10-13 10:52:21,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:21,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:52:21,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244017132] [2020-10-13 10:52:21,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:52:21,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:21,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:52:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:21,031 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 22 states. [2020-10-13 10:52:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:21,500 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-10-13 10:52:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:52:21,501 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2020-10-13 10:52:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:21,502 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:52:21,502 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:52:21,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:52:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:52:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-13 10:52:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:52:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 10:52:21,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2020-10-13 10:52:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:21,508 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 10:52:21,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:52:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 10:52:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 10:52:21,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:21,510 INFO L422 BasicCegarLoop]: trace histogram [29, 19, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:21,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:52:21,510 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash -831506821, now seen corresponding path program 19 times [2020-10-13 10:52:21,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:21,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562880754] [2020-10-13 10:52:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:23,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 10:52:23,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:23,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1713 [2020-10-13 10:52:23,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:23,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:52:23,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 10:52:23,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:52:23,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:23,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:23,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:23,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:23,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:23,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:23,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:23,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:23,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 390 proven. 361 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 10:52:23,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562880754] [2020-10-13 10:52:23,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:23,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:23,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320177104] [2020-10-13 10:52:23,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:23,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:23,506 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 23 states. [2020-10-13 10:52:24,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:24,006 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-10-13 10:52:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:24,007 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-13 10:52:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:24,008 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:52:24,008 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:52:24,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:52:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:52:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 10:52:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 10:52:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 10:52:24,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2020-10-13 10:52:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:24,017 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 10:52:24,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 10:52:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:52:24,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:24,018 INFO L422 BasicCegarLoop]: trace histogram [30, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:24,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:52:24,018 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash -221676011, now seen corresponding path program 20 times [2020-10-13 10:52:24,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:24,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101673735] [2020-10-13 10:52:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:25,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:25,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 10:52:25,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:25,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-13 10:52:25,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:52:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:52:25,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:26,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 429 proven. 110 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 10:52:26,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101673735] [2020-10-13 10:52:26,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:26,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:26,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96507857] [2020-10-13 10:52:26,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:26,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:26,192 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 23 states. [2020-10-13 10:52:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:26,637 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-10-13 10:52:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:26,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 87 [2020-10-13 10:52:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:26,638 INFO L225 Difference]: With dead ends: 132 [2020-10-13 10:52:26,638 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:52:26,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:52:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:52:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 10:52:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 10:52:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-13 10:52:26,645 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2020-10-13 10:52:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:26,646 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-13 10:52:26,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-13 10:52:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 10:52:26,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:26,647 INFO L422 BasicCegarLoop]: trace histogram [31, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:26,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:52:26,648 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash 489294610, now seen corresponding path program 21 times [2020-10-13 10:52:26,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:26,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505203590] [2020-10-13 10:52:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3757 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 10:52:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:52:30,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:30,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:30,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 451 proven. 400 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 10:52:30,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505203590] [2020-10-13 10:52:30,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:30,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:52:30,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182510390] [2020-10-13 10:52:30,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:52:30,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:52:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:30,728 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 24 states. [2020-10-13 10:52:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:31,247 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-10-13 10:52:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:52:31,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-10-13 10:52:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:31,249 INFO L225 Difference]: With dead ends: 96 [2020-10-13 10:52:31,249 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 10:52:31,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:52:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 10:52:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 10:52:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 10:52:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-13 10:52:31,257 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2020-10-13 10:52:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:31,257 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-13 10:52:31,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:52:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-13 10:52:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 10:52:31,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:31,258 INFO L422 BasicCegarLoop]: trace histogram [32, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:31,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:52:31,259 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2053146860, now seen corresponding path program 22 times [2020-10-13 10:52:31,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:31,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196186419] [2020-10-13 10:52:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:31,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2175 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:52:33,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:33,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:33,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 492 proven. 132 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 10:52:33,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196186419] [2020-10-13 10:52:33,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:33,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:52:33,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051806733] [2020-10-13 10:52:33,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:52:33,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:52:33,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:33,736 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 24 states. [2020-10-13 10:52:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:34,311 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-10-13 10:52:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:52:34,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-10-13 10:52:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:34,313 INFO L225 Difference]: With dead ends: 138 [2020-10-13 10:52:34,313 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:52:34,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:52:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:52:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 10:52:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 10:52:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-13 10:52:34,319 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2020-10-13 10:52:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:34,319 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-13 10:52:34,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:52:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-13 10:52:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:52:34,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:34,321 INFO L422 BasicCegarLoop]: trace histogram [33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:34,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:52:34,321 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 931680105, now seen corresponding path program 23 times [2020-10-13 10:52:34,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:34,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552903213] [2020-10-13 10:52:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:34,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2316 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:52:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:36,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:36,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:36,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 516 proven. 441 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 10:52:36,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552903213] [2020-10-13 10:52:36,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:36,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:36,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802482916] [2020-10-13 10:52:36,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:36,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:36,950 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 25 states. [2020-10-13 10:52:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:37,521 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-10-13 10:52:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:37,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2020-10-13 10:52:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:37,523 INFO L225 Difference]: With dead ends: 100 [2020-10-13 10:52:37,523 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:52:37,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:52:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:52:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-13 10:52:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:52:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-13 10:52:37,528 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2020-10-13 10:52:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:37,528 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-13 10:52:37,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-13 10:52:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 10:52:37,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:37,529 INFO L422 BasicCegarLoop]: trace histogram [34, 22, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:37,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:52:37,529 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1983845251, now seen corresponding path program 24 times [2020-10-13 10:52:37,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:37,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847138842] [2020-10-13 10:52:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4572 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:52:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:42,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:42,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:42,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 559 proven. 156 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 10:52:42,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847138842] [2020-10-13 10:52:42,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:42,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:42,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508303675] [2020-10-13 10:52:42,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:42,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:42,423 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 25 states. [2020-10-13 10:52:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:43,025 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-10-13 10:52:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:43,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-13 10:52:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:43,027 INFO L225 Difference]: With dead ends: 144 [2020-10-13 10:52:43,027 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:52:43,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:52:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:52:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-13 10:52:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 10:52:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-13 10:52:43,033 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2020-10-13 10:52:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:43,034 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-13 10:52:43,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-13 10:52:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 10:52:43,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:43,035 INFO L422 BasicCegarLoop]: trace histogram [35, 22, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:43,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:52:43,035 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:43,036 INFO L82 PathProgramCache]: Analyzing trace with hash 888492928, now seen corresponding path program 25 times [2020-10-13 10:52:43,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:43,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229149779] [2020-10-13 10:52:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:43,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:52:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:52:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:45,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:45,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 585 proven. 484 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 10:52:45,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229149779] [2020-10-13 10:52:45,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:52:45,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957182102] [2020-10-13 10:52:45,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:52:45,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:52:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:45,882 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 26 states. [2020-10-13 10:52:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,516 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-10-13 10:52:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:52:46,517 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2020-10-13 10:52:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,518 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:52:46,518 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:52:46,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:52:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:52:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 10:52:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:52:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 10:52:46,523 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-10-13 10:52:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,523 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 10:52:46,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:52:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 10:52:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:52:46,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,524 INFO L422 BasicCegarLoop]: trace histogram [36, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:52:46,525 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash -864326182, now seen corresponding path program 26 times [2020-10-13 10:52:46,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453162993] [2020-10-13 10:52:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2870 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:52:49,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:49,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:49,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:49,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:49,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:49,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:49,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 182 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 10:52:49,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453162993] [2020-10-13 10:52:49,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:49,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:52:49,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643522731] [2020-10-13 10:52:49,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:52:49,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:52:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:49,824 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 26 states. [2020-10-13 10:52:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:50,460 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-10-13 10:52:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:52:50,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-10-13 10:52:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:50,462 INFO L225 Difference]: With dead ends: 150 [2020-10-13 10:52:50,462 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:52:50,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:52:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:52:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-13 10:52:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 10:52:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-13 10:52:50,469 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2020-10-13 10:52:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:50,470 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-13 10:52:50,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:52:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-13 10:52:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 10:52:50,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:50,471 INFO L422 BasicCegarLoop]: trace histogram [37, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:50,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:52:50,471 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -974690473, now seen corresponding path program 27 times [2020-10-13 10:52:50,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:50,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570549892] [2020-10-13 10:52:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:50,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:53,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 10:52:53,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-10-13 10:52:53,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:52:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 10:52:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:52:53,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:53,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:53,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:53,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:53,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:53,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:53,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 658 proven. 529 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 10:52:53,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570549892] [2020-10-13 10:52:53,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:53,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:52:53,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633595815] [2020-10-13 10:52:53,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:52:53,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:52:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:53,630 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 27 states. [2020-10-13 10:52:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:54,288 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2020-10-13 10:52:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:52:54,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-10-13 10:52:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:54,290 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:52:54,291 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:52:54,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:52:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:52:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 10:52:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 10:52:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-13 10:52:54,297 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2020-10-13 10:52:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:54,297 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-13 10:52:54,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:52:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-13 10:52:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 10:52:54,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:54,298 INFO L422 BasicCegarLoop]: trace histogram [38, 24, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:54,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:52:54,299 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash -382212111, now seen corresponding path program 28 times [2020-10-13 10:52:54,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:54,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103626054] [2020-10-13 10:52:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3048 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:52:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:52:57,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:57,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 705 proven. 210 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 10:52:57,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103626054] [2020-10-13 10:52:57,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:57,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:52:57,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986481824] [2020-10-13 10:52:57,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:52:57,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:52:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:57,728 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 27 states. [2020-10-13 10:52:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:58,419 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-10-13 10:52:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:52:58,420 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-10-13 10:52:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:58,422 INFO L225 Difference]: With dead ends: 156 [2020-10-13 10:52:58,422 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:52:58,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:52:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:52:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 10:52:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:52:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 10:52:58,428 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2020-10-13 10:52:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:58,429 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 10:52:58,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:52:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 10:52:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 10:52:58,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:58,430 INFO L422 BasicCegarLoop]: trace histogram [39, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:58,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:52:58,430 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash -253699346, now seen corresponding path program 29 times [2020-10-13 10:52:58,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:58,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081254190] [2020-10-13 10:52:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:01,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:01,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 10:53:01,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:01,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3343 [2020-10-13 10:53:01,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:53:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 10:53:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:53:01,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:02,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:02,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 735 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:53:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081254190] [2020-10-13 10:53:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:53:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054625756] [2020-10-13 10:53:02,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:53:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:53:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:02,182 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 28 states. [2020-10-13 10:53:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:02,875 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-10-13 10:53:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:53:02,875 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2020-10-13 10:53:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:02,877 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:53:02,877 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:53:02,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:53:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:53:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 10:53:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:53:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-13 10:53:02,883 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2020-10-13 10:53:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:02,884 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-13 10:53:02,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:53:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-13 10:53:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 10:53:02,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:02,885 INFO L422 BasicCegarLoop]: trace histogram [40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:02,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:53:02,885 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1000526280, now seen corresponding path program 30 times [2020-10-13 10:53:02,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:02,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061767530] [2020-10-13 10:53:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:06,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3539 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:53:06,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:06,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:06,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:06,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:06,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 784 proven. 240 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 10:53:06,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061767530] [2020-10-13 10:53:06,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:06,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:53:06,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649338996] [2020-10-13 10:53:06,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:53:06,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:53:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:06,828 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 28 states. [2020-10-13 10:53:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:07,514 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-10-13 10:53:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:53:07,515 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-10-13 10:53:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:07,516 INFO L225 Difference]: With dead ends: 162 [2020-10-13 10:53:07,516 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:53:07,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:53:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:53:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-13 10:53:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 10:53:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-13 10:53:07,523 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2020-10-13 10:53:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:07,523 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-13 10:53:07,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:53:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-13 10:53:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 10:53:07,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:07,524 INFO L422 BasicCegarLoop]: trace histogram [41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:07,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:53:07,525 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1888485819, now seen corresponding path program 31 times [2020-10-13 10:53:07,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:07,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123676864] [2020-10-13 10:53:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:11,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:53:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:11,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:11,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:11,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:11,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 816 proven. 625 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 10:53:11,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123676864] [2020-10-13 10:53:11,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:53:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232279491] [2020-10-13 10:53:11,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:53:11,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:53:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:11,791 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 29 states. [2020-10-13 10:53:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:12,541 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2020-10-13 10:53:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:53:12,542 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-10-13 10:53:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:12,543 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:53:12,543 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 10:53:12,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:53:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 10:53:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 10:53:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:53:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-13 10:53:12,549 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2020-10-13 10:53:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:12,550 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-13 10:53:12,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:53:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-13 10:53:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:53:12,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:12,551 INFO L422 BasicCegarLoop]: trace histogram [42, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:12,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:53:12,551 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1928756063, now seen corresponding path program 32 times [2020-10-13 10:53:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:12,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817366277] [2020-10-13 10:53:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:12,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3992 [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:53:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:53:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:53:16,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:16,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:16,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:16,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:16,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:16,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 867 proven. 272 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 10:53:16,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817366277] [2020-10-13 10:53:16,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:16,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:53:16,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437153541] [2020-10-13 10:53:16,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:53:16,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:53:16,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:16,980 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 29 states. [2020-10-13 10:53:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:17,758 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-10-13 10:53:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:53:17,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 111 [2020-10-13 10:53:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:17,760 INFO L225 Difference]: With dead ends: 168 [2020-10-13 10:53:17,760 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:53:17,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:53:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:53:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-13 10:53:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 10:53:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-10-13 10:53:17,767 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2020-10-13 10:53:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:17,767 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-10-13 10:53:17,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:53:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-10-13 10:53:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 10:53:17,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:17,768 INFO L422 BasicCegarLoop]: trace histogram [43, 26, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:17,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:53:17,769 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1959845540, now seen corresponding path program 33 times [2020-10-13 10:53:17,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:17,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57826409] [2020-10-13 10:53:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:17,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:22,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4291 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:53:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:22,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:22,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:22,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:22,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:22,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:22,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:22,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:22,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:22,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:22,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:22,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 901 proven. 676 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 10:53:22,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57826409] [2020-10-13 10:53:22,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:22,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:53:22,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576682332] [2020-10-13 10:53:22,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:53:22,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:53:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:22,539 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 30 states. [2020-10-13 10:53:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:23,340 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2020-10-13 10:53:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:53:23,341 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 113 [2020-10-13 10:53:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:23,345 INFO L225 Difference]: With dead ends: 120 [2020-10-13 10:53:23,345 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:53:23,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:53:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:53:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 10:53:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 10:53:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-10-13 10:53:23,350 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2020-10-13 10:53:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:23,351 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-10-13 10:53:23,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:53:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-10-13 10:53:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 10:53:23,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:23,351 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:23,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:53:23,352 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2071540918, now seen corresponding path program 34 times [2020-10-13 10:53:23,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:23,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200785495] [2020-10-13 10:53:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:27,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4519 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:53:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:53:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:28,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:28,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:28,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:28,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:28,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:28,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 954 proven. 306 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 10:53:28,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200785495] [2020-10-13 10:53:28,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:28,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:53:28,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673271731] [2020-10-13 10:53:28,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:53:28,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:53:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:28,345 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 30 states. [2020-10-13 10:53:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:29,164 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-10-13 10:53:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:53:29,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2020-10-13 10:53:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:29,166 INFO L225 Difference]: With dead ends: 174 [2020-10-13 10:53:29,166 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:53:29,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:53:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:53:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 10:53:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 10:53:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-10-13 10:53:29,173 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2020-10-13 10:53:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:29,173 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-10-13 10:53:29,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:53:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-10-13 10:53:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 10:53:29,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:29,174 INFO L422 BasicCegarLoop]: trace histogram [45, 27, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:29,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:53:29,174 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash -624651213, now seen corresponding path program 35 times [2020-10-13 10:53:29,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:29,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682432728] [2020-10-13 10:53:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4521 [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:53:33,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 10:53:33,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:53:33,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:34,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:34,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:34,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:34,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:34,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:34,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 990 proven. 729 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 10:53:34,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682432728] [2020-10-13 10:53:34,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:34,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:53:34,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275728121] [2020-10-13 10:53:34,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:53:34,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:53:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:34,201 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 31 states. [2020-10-13 10:53:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:35,036 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-10-13 10:53:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:53:35,037 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 117 [2020-10-13 10:53:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:35,038 INFO L225 Difference]: With dead ends: 124 [2020-10-13 10:53:35,038 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 10:53:35,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 10:53:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 10:53:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:53:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-10-13 10:53:35,044 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2020-10-13 10:53:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:35,045 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-10-13 10:53:35,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:53:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-10-13 10:53:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 10:53:35,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:35,046 INFO L422 BasicCegarLoop]: trace histogram [46, 28, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:35,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:53:35,046 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 998067661, now seen corresponding path program 36 times [2020-10-13 10:53:35,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:35,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199613334] [2020-10-13 10:53:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:40,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 10:53:40,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:40,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:53:40,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:53:40,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:40,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1045 proven. 342 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 10:53:40,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199613334] [2020-10-13 10:53:40,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:40,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:53:40,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644149751] [2020-10-13 10:53:40,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:53:40,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:53:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:40,566 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 31 states. [2020-10-13 10:53:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:41,444 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-10-13 10:53:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:53:41,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 119 [2020-10-13 10:53:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:41,447 INFO L225 Difference]: With dead ends: 180 [2020-10-13 10:53:41,447 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:53:41,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:53:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-13 10:53:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 10:53:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-13 10:53:41,453 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2020-10-13 10:53:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:41,454 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-13 10:53:41,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:53:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-13 10:53:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 10:53:41,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:41,455 INFO L422 BasicCegarLoop]: trace histogram [47, 28, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:41,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:53:41,455 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1055041226, now seen corresponding path program 37 times [2020-10-13 10:53:41,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:41,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037273634] [2020-10-13 10:53:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:53:46,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:46,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:46,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1083 proven. 784 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 10:53:47,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037273634] [2020-10-13 10:53:47,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:47,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:53:47,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629717663] [2020-10-13 10:53:47,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:53:47,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:53:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:47,003 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 32 states. [2020-10-13 10:53:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:47,902 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-10-13 10:53:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:53:47,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 121 [2020-10-13 10:53:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:47,905 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:53:47,905 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 10:53:47,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 10:53:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 10:53:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 10:53:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-10-13 10:53:47,910 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2020-10-13 10:53:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:47,911 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-10-13 10:53:47,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:53:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-10-13 10:53:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 10:53:47,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:47,912 INFO L422 BasicCegarLoop]: trace histogram [48, 29, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:47,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:53:47,912 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 274798244, now seen corresponding path program 38 times [2020-10-13 10:53:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:47,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948658427] [2020-10-13 10:53:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:52,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 10:53:52,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:52,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:53:52,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:53:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:53:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:53:52,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:53,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:53,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:53,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:53,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:53:53,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:53,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:53,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:53,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1140 proven. 380 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 10:53:53,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948658427] [2020-10-13 10:53:53,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:53,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:53:53,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648315007] [2020-10-13 10:53:53,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:53:53,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:53:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:53,473 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 32 states. [2020-10-13 10:53:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:54,647 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-10-13 10:53:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:53:54,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 123 [2020-10-13 10:53:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:54,649 INFO L225 Difference]: With dead ends: 186 [2020-10-13 10:53:54,650 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:53:54,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:53:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-13 10:53:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 10:53:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-10-13 10:53:54,659 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2020-10-13 10:53:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:54,660 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-10-13 10:53:54,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:53:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-10-13 10:53:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 10:53:54,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:54,662 INFO L422 BasicCegarLoop]: trace histogram [49, 29, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:54,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:53:54,662 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1085822687, now seen corresponding path program 39 times [2020-10-13 10:53:54,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:54,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235687956] [2020-10-13 10:53:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:54,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:59,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:59,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:53:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:00,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:00,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:00,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:00,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:00,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1180 proven. 841 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 10:54:00,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235687956] [2020-10-13 10:54:00,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:00,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:54:00,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196626888] [2020-10-13 10:54:00,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:54:00,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:00,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:54:00,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:00,261 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 33 states. [2020-10-13 10:54:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:01,183 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2020-10-13 10:54:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:54:01,183 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 125 [2020-10-13 10:54:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:01,185 INFO L225 Difference]: With dead ends: 132 [2020-10-13 10:54:01,185 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:54:01,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:54:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:54:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 10:54:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 10:54:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-10-13 10:54:01,192 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2020-10-13 10:54:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:01,192 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-10-13 10:54:01,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:54:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-10-13 10:54:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 10:54:01,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:01,193 INFO L422 BasicCegarLoop]: trace histogram [50, 30, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:01,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:54:01,194 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 193912635, now seen corresponding path program 40 times [2020-10-13 10:54:01,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:01,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744278107] [2020-10-13 10:54:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:01,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:01,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:06,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 10:54:06,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:54:06,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:06,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:06,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1239 proven. 420 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 10:54:06,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744278107] [2020-10-13 10:54:06,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:06,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:54:06,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271813629] [2020-10-13 10:54:06,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:54:06,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:54:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:06,792 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 33 states. [2020-10-13 10:54:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:07,721 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-10-13 10:54:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:54:07,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-10-13 10:54:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:07,723 INFO L225 Difference]: With dead ends: 192 [2020-10-13 10:54:07,723 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 10:54:07,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:54:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 10:54:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 10:54:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 10:54:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-13 10:54:07,729 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2020-10-13 10:54:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:07,729 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-13 10:54:07,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:54:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-13 10:54:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 10:54:07,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:07,731 INFO L422 BasicCegarLoop]: trace histogram [51, 30, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:07,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:54:07,731 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash -406983880, now seen corresponding path program 41 times [2020-10-13 10:54:07,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:07,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117169728] [2020-10-13 10:54:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:12,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:12,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:54:12,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:54:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:54:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 10:54:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:54:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:13,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:13,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:13,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1281 proven. 900 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 10:54:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117169728] [2020-10-13 10:54:13,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:13,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:54:13,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453050792] [2020-10-13 10:54:13,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:54:13,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:54:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:13,360 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 34 states. [2020-10-13 10:54:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:14,342 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-10-13 10:54:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:54:14,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 129 [2020-10-13 10:54:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:14,344 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:54:14,344 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 10:54:14,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:54:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 10:54:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-13 10:54:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 10:54:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-13 10:54:14,351 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2020-10-13 10:54:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:14,352 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-13 10:54:14,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:54:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-13 10:54:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 10:54:14,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:14,353 INFO L422 BasicCegarLoop]: trace histogram [52, 31, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:14,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:54:14,353 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -277022830, now seen corresponding path program 42 times [2020-10-13 10:54:14,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:14,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873808516] [2020-10-13 10:54:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:14,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:19,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 10:54:19,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:54:19,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:19,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:54:19,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:54:19,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:54:19,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:19,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:19,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:19,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:19,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1342 proven. 462 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 10:54:19,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873808516] [2020-10-13 10:54:19,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:19,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:54:19,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598998506] [2020-10-13 10:54:19,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:54:19,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:54:19,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:19,974 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 34 states. [2020-10-13 10:54:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:21,008 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-10-13 10:54:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:54:21,008 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 131 [2020-10-13 10:54:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:21,010 INFO L225 Difference]: With dead ends: 198 [2020-10-13 10:54:21,010 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:54:21,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:54:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:54:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-13 10:54:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:54:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-10-13 10:54:21,016 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2020-10-13 10:54:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:21,017 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-10-13 10:54:21,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:54:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-10-13 10:54:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 10:54:21,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:21,018 INFO L422 BasicCegarLoop]: trace histogram [53, 31, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:21,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:54:21,018 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash -988037873, now seen corresponding path program 43 times [2020-10-13 10:54:21,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:21,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230056750] [2020-10-13 10:54:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:21,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:26,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:26,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 10:54:26,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:26,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:54:26,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 10:54:26,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:54:26,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:26,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1386 proven. 961 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 10:54:26,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230056750] [2020-10-13 10:54:26,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:26,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:54:26,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207122368] [2020-10-13 10:54:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:54:26,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:54:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:26,710 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 35 states. [2020-10-13 10:54:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:27,750 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2020-10-13 10:54:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:54:27,751 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-13 10:54:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:27,752 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:54:27,752 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:54:27,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:54:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:54:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 10:54:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:54:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-10-13 10:54:27,758 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2020-10-13 10:54:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:27,758 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-10-13 10:54:27,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:54:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-10-13 10:54:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 10:54:27,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:27,760 INFO L422 BasicCegarLoop]: trace histogram [54, 32, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:27,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:54:27,760 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash -324161623, now seen corresponding path program 44 times [2020-10-13 10:54:27,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:27,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228657143] [2020-10-13 10:54:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:28,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:54:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:54:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:33,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:33,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:33,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:54:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1449 proven. 506 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 10:54:33,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228657143] [2020-10-13 10:54:33,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:33,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:54:33,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781522921] [2020-10-13 10:54:33,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:54:33,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:54:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:33,417 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 35 states. [2020-10-13 10:54:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:34,463 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-10-13 10:54:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:54:34,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 135 [2020-10-13 10:54:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:34,466 INFO L225 Difference]: With dead ends: 204 [2020-10-13 10:54:34,466 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 10:54:34,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:54:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 10:54:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-13 10:54:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 10:54:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-10-13 10:54:34,473 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2020-10-13 10:54:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:34,473 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-10-13 10:54:34,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:54:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-10-13 10:54:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 10:54:34,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:34,474 INFO L422 BasicCegarLoop]: trace histogram [55, 32, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:34,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:54:34,474 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1572639066, now seen corresponding path program 45 times [2020-10-13 10:54:34,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:34,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313241090] [2020-10-13 10:54:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:54:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 10:54:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:54:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:40,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:40,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:40,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:40,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1495 proven. 1024 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 10:54:40,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313241090] [2020-10-13 10:54:40,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:40,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:54:40,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010430750] [2020-10-13 10:54:40,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:54:40,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:40,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:54:40,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:40,186 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 36 states. [2020-10-13 10:54:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:41,292 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-10-13 10:54:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:54:41,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 137 [2020-10-13 10:54:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:41,294 INFO L225 Difference]: With dead ends: 144 [2020-10-13 10:54:41,294 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 10:54:41,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 10:54:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 10:54:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 10:54:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-10-13 10:54:41,300 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2020-10-13 10:54:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:41,300 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-10-13 10:54:41,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:54:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-10-13 10:54:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 10:54:41,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:41,302 INFO L422 BasicCegarLoop]: trace histogram [56, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:41,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:54:41,302 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash 514807680, now seen corresponding path program 46 times [2020-10-13 10:54:41,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:41,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829050007] [2020-10-13 10:54:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:46,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:46,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:54:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:46,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:46,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:46,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1560 proven. 552 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 10:54:47,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829050007] [2020-10-13 10:54:47,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:47,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:54:47,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142381904] [2020-10-13 10:54:47,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:54:47,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:54:47,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:47,005 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 36 states. [2020-10-13 10:54:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:48,045 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-10-13 10:54:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:54:48,046 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 139 [2020-10-13 10:54:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:48,047 INFO L225 Difference]: With dead ends: 210 [2020-10-13 10:54:48,047 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:54:48,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:54:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 10:54:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 10:54:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-13 10:54:48,053 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2020-10-13 10:54:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:48,053 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-13 10:54:48,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:54:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-13 10:54:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 10:54:48,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:48,054 INFO L422 BasicCegarLoop]: trace histogram [57, 33, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:48,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:54:48,055 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2061283331, now seen corresponding path program 47 times [2020-10-13 10:54:48,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:48,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518179999] [2020-10-13 10:54:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:48,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 10:54:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:54:53,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1608 proven. 1089 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 10:54:53,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518179999] [2020-10-13 10:54:53,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:53,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:54:53,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967811817] [2020-10-13 10:54:53,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:54:53,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:54:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:53,807 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 37 states. [2020-10-13 10:54:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:54,957 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2020-10-13 10:54:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:54:54,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 141 [2020-10-13 10:54:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:54,960 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:54:54,960 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 10:54:54,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:54:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 10:54:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 10:54:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:54:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-10-13 10:54:54,964 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2020-10-13 10:54:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:54,965 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-10-13 10:54:54,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:54:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-10-13 10:54:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 10:54:54,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:54,966 INFO L422 BasicCegarLoop]: trace histogram [58, 34, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:54:54,966 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -920895721, now seen corresponding path program 48 times [2020-10-13 10:54:54,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680156133] [2020-10-13 10:54:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:54:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:54:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:54:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:00,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:00,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:00,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1675 proven. 600 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 10:55:00,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680156133] [2020-10-13 10:55:00,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:00,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:55:00,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152652612] [2020-10-13 10:55:00,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:55:00,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:55:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:55:00,700 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 37 states. [2020-10-13 10:55:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:01,896 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-10-13 10:55:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:55:01,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 143 [2020-10-13 10:55:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:01,898 INFO L225 Difference]: With dead ends: 216 [2020-10-13 10:55:01,898 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 10:55:01,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:55:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 10:55:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-13 10:55:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 10:55:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-10-13 10:55:01,904 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2020-10-13 10:55:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:01,904 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-10-13 10:55:01,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:55:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-10-13 10:55:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 10:55:01,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:01,906 INFO L422 BasicCegarLoop]: trace histogram [59, 34, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:01,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:55:01,906 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:01,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1807069460, now seen corresponding path program 49 times [2020-10-13 10:55:01,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:01,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807684054] [2020-10-13 10:55:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:02,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:06,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:55:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:55:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:55:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:07,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:07,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:07,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:07,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:07,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:07,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:07,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1725 proven. 1156 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 10:55:07,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807684054] [2020-10-13 10:55:07,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:07,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:55:07,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128944351] [2020-10-13 10:55:07,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:55:07,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:07,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:55:07,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:07,683 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 38 states. [2020-10-13 10:55:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:08,886 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2020-10-13 10:55:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:55:08,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 145 [2020-10-13 10:55:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:08,888 INFO L225 Difference]: With dead ends: 152 [2020-10-13 10:55:08,888 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:55:08,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:55:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:55:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 10:55:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 10:55:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-10-13 10:55:08,894 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2020-10-13 10:55:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:08,894 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-10-13 10:55:08,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:55:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-10-13 10:55:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 10:55:08,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:08,896 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:08,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:55:08,896 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1419425390, now seen corresponding path program 50 times [2020-10-13 10:55:08,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:08,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89506120] [2020-10-13 10:55:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:09,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 10:55:13,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:55:13,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:55:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:55:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:14,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:14,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:14,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1794 proven. 650 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 10:55:14,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89506120] [2020-10-13 10:55:14,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:14,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:55:14,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062220018] [2020-10-13 10:55:14,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:55:14,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:55:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:14,674 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 38 states. [2020-10-13 10:55:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:15,927 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-10-13 10:55:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:55:15,928 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 147 [2020-10-13 10:55:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:15,929 INFO L225 Difference]: With dead ends: 222 [2020-10-13 10:55:15,929 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:55:15,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:55:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:55:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-13 10:55:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 10:55:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-10-13 10:55:15,936 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2020-10-13 10:55:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:15,936 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-10-13 10:55:15,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:55:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-10-13 10:55:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 10:55:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:15,937 INFO L422 BasicCegarLoop]: trace histogram [61, 35, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:15,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:55:15,938 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1224794603, now seen corresponding path program 51 times [2020-10-13 10:55:15,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:15,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307595471] [2020-10-13 10:55:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:20,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:20,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:55:20,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:20,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:55:20,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:55:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:55:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:55:20,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:21,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:21,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:21,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:21,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:21,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:21,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1846 proven. 1225 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 10:55:21,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307595471] [2020-10-13 10:55:21,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:21,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:55:21,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083367603] [2020-10-13 10:55:21,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:55:21,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:55:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:21,775 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 39 states. [2020-10-13 10:55:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:22,980 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2020-10-13 10:55:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:55:22,981 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 149 [2020-10-13 10:55:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:22,982 INFO L225 Difference]: With dead ends: 156 [2020-10-13 10:55:22,983 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 10:55:22,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:55:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 10:55:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-13 10:55:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 10:55:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-13 10:55:22,989 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2020-10-13 10:55:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:22,989 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-13 10:55:22,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:55:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-13 10:55:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 10:55:22,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:22,990 INFO L422 BasicCegarLoop]: trace histogram [62, 36, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:22,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:55:22,990 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash 199036293, now seen corresponding path program 52 times [2020-10-13 10:55:22,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:22,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255526453] [2020-10-13 10:55:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:55:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:55:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1917 proven. 702 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 10:55:28,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255526453] [2020-10-13 10:55:28,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:28,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:55:28,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028336280] [2020-10-13 10:55:28,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:55:28,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:55:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:28,810 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 39 states. [2020-10-13 10:55:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:30,126 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-10-13 10:55:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:55:30,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 151 [2020-10-13 10:55:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:30,128 INFO L225 Difference]: With dead ends: 228 [2020-10-13 10:55:30,128 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 10:55:30,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:55:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 10:55:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 10:55:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 10:55:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-10-13 10:55:30,134 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2020-10-13 10:55:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:30,134 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-10-13 10:55:30,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:55:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-10-13 10:55:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 10:55:30,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:30,135 INFO L422 BasicCegarLoop]: trace histogram [63, 36, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:30,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 10:55:30,135 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1038667134, now seen corresponding path program 53 times [2020-10-13 10:55:30,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:30,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839247198] [2020-10-13 10:55:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 10:55:35,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:55:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1971 proven. 1296 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 10:55:36,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839247198] [2020-10-13 10:55:36,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:36,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:55:36,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844581457] [2020-10-13 10:55:36,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:55:36,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:55:36,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:36,006 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 40 states. [2020-10-13 10:55:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:37,344 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2020-10-13 10:55:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:55:37,345 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 153 [2020-10-13 10:55:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:37,346 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:55:37,346 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:55:37,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 10:55:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:55:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 10:55:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 10:55:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2020-10-13 10:55:37,352 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2020-10-13 10:55:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:37,352 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2020-10-13 10:55:37,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:55:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2020-10-13 10:55:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 10:55:37,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:37,353 INFO L422 BasicCegarLoop]: trace histogram [64, 37, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:37,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 10:55:37,354 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1734241188, now seen corresponding path program 54 times [2020-10-13 10:55:37,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:37,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056486642] [2020-10-13 10:55:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:42,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:42,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 10:55:42,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:55:42,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:55:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0