/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 18:30:52,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 18:30:52,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 18:30:52,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 18:30:52,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 18:30:52,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 18:30:52,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 18:30:52,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 18:30:52,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 18:30:52,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 18:30:52,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 18:30:52,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 18:30:52,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 18:30:52,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 18:30:52,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 18:30:52,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 18:30:52,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 18:30:52,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 18:30:52,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 18:30:52,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 18:30:52,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 18:30:52,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 18:30:52,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 18:30:52,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 18:30:52,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 18:30:52,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 18:30:52,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 18:30:52,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 18:30:52,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 18:30:52,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 18:30:52,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 18:30:52,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 18:30:52,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 18:30:52,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 18:30:52,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 18:30:52,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 18:30:52,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 18:30:52,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 18:30:52,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 18:30:52,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 18:30:52,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 18:30:52,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 18:30:53,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 18:30:53,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 18:30:53,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 18:30:53,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 18:30:53,003 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 18:30:53,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 18:30:53,003 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 18:30:53,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 18:30:53,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 18:30:53,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 18:30:53,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 18:30:53,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 18:30:53,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 18:30:53,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 18:30:53,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 18:30:53,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 18:30:53,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 18:30:53,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 18:30:53,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 18:30:53,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 18:30:53,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 18:30:53,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:30:53,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 18:30:53,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 18:30:53,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 18:30:53,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 18:30:53,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 18:30:53,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 18:30:53,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 18:30:53,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 18:30:53,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 18:30:53,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 18:30:53,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 18:30:53,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 18:30:53,387 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 18:30:53,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2020-10-12 18:30:53,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecd7f24d7/b69ba724a2fb41838c8bc8f86afbb76d/FLAGbe925b40e [2020-10-12 18:30:53,940 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 18:30:53,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sep.i [2020-10-12 18:30:53,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecd7f24d7/b69ba724a2fb41838c8bc8f86afbb76d/FLAGbe925b40e [2020-10-12 18:30:54,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecd7f24d7/b69ba724a2fb41838c8bc8f86afbb76d [2020-10-12 18:30:54,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 18:30:54,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 18:30:54,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 18:30:54,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 18:30:54,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 18:30:54,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c294ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54, skipping insertion in model container [2020-10-12 18:30:54,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 18:30:54,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 18:30:54,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:30:54,606 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 18:30:54,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:30:54,653 INFO L208 MainTranslator]: Completed translation [2020-10-12 18:30:54,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54 WrapperNode [2020-10-12 18:30:54,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 18:30:54,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 18:30:54,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 18:30:54,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 18:30:54,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... [2020-10-12 18:30:54,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 18:30:54,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 18:30:54,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 18:30:54,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 18:30:54,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:30:54,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 18:30:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 18:30:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2020-10-12 18:30:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 18:30:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 18:30:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 18:30:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2020-10-12 18:30:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 18:30:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 18:30:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 18:30:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 18:30:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 18:30:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 18:30:54,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 18:30:55,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 18:30:55,261 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 18:30:55,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:30:55 BoogieIcfgContainer [2020-10-12 18:30:55,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 18:30:55,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 18:30:55,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 18:30:55,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 18:30:55,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:30:54" (1/3) ... [2020-10-12 18:30:55,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ed2b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:30:55, skipping insertion in model container [2020-10-12 18:30:55,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:30:54" (2/3) ... [2020-10-12 18:30:55,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ed2b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:30:55, skipping insertion in model container [2020-10-12 18:30:55,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:30:55" (3/3) ... [2020-10-12 18:30:55,274 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2020-10-12 18:30:55,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 18:30:55,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 18:30:55,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 18:30:55,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 18:30:55,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 18:30:55,333 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 18:30:55,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 18:30:55,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 18:30:55,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 18:30:55,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 18:30:55,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 18:30:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 18:30:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 18:30:55,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:30:55,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:30:55,363 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:30:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:30:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1691531413, now seen corresponding path program 1 times [2020-10-12 18:30:55,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:30:55,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781084572] [2020-10-12 18:30:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:30:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:56,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:57,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:30:57,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 18:30:57,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 18:30:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-12 18:30:57,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:30:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 18:30:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 18:30:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 18:30:57,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 18:30:58,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:30:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:30:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:30:58,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:30:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 18:30:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:30:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:30:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:30:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:30:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:30:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:30:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:58,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:30:58,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:30:58,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:30:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 18:30:58,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:30:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:30:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:30:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:30:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:30:58,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 18:30:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:58,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:30:58,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:30:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:30:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 18:30:58,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:30:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:30:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:30:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:30:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:30:58,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 18:30:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:58,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:58,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:30:58,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:30:58,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:30:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 18:30:58,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:30:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:30:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:30:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:30:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:30:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 18:30:58,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781084572] [2020-10-12 18:30:58,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:30:58,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 18:30:58,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860244905] [2020-10-12 18:30:58,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 18:30:58,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:30:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 18:30:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:30:58,600 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 11 states. [2020-10-12 18:30:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:30:59,060 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2020-10-12 18:30:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 18:30:59,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 18:30:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:30:59,075 INFO L225 Difference]: With dead ends: 90 [2020-10-12 18:30:59,076 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 18:30:59,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 18:30:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 18:30:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-10-12 18:30:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 18:30:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-10-12 18:30:59,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 32 [2020-10-12 18:30:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:30:59,139 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-10-12 18:30:59,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 18:30:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-10-12 18:30:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 18:30:59,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:30:59,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 18:30:59,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 18:30:59,143 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:30:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:30:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1797571712, now seen corresponding path program 1 times [2020-10-12 18:30:59,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:30:59,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117696304] [2020-10-12 18:30:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:30:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:30:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:59,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:59,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:30:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:00,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 18:31:00,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 18:31:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-12 18:31:00,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:31:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 18:31:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:00,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:00,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:00,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:00,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:00,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:00,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:31:00,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:00,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:00,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:00,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:00,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:31:00,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:00,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:31:00,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:00,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:00,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 18:31:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:00,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:00,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:31:00,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:00,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 18:31:00,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:31:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 18:31:00,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:00,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 18:31:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:00,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:00,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:00,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 18:31:00,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:31:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:00,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 18:31:00,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 18:31:00,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117696304] [2020-10-12 18:31:00,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:00,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 18:31:00,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417487920] [2020-10-12 18:31:00,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 18:31:00,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 18:31:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:31:00,777 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-10-12 18:31:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:00,964 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-10-12 18:31:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 18:31:00,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-12 18:31:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:00,966 INFO L225 Difference]: With dead ends: 56 [2020-10-12 18:31:00,966 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 18:31:00,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:31:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 18:31:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-12 18:31:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 18:31:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-12 18:31:00,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 35 [2020-10-12 18:31:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:00,974 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-12 18:31:00,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 18:31:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-12 18:31:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 18:31:00,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:00,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:00,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 18:31:00,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2111009974, now seen corresponding path program 2 times [2020-10-12 18:31:00,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:00,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632776922] [2020-10-12 18:31:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:01,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:03,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 18:31:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 18:31:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 18:31:05,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 18:31:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 18:31:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 18:31:05,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:06,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:06,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:06,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:06,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:31:06,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:06,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:06,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:06,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:06,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:06,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 18:31:06,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:06,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:31:06,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:06,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 18:31:06,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 18:31:06,476 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 5 [2020-10-12 18:31:06,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 18:31:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:06,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 18:31:06,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 18:31:06,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:06,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 18:31:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:06,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:06,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:06,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:06,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 18:31:06,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 18:31:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 18:31:06,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632776922] [2020-10-12 18:31:06,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:06,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 18:31:06,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181755248] [2020-10-12 18:31:06,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 18:31:06,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:06,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 18:31:06,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 18:31:06,718 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 12 states. [2020-10-12 18:31:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:07,111 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-10-12 18:31:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 18:31:07,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-12 18:31:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:07,113 INFO L225 Difference]: With dead ends: 63 [2020-10-12 18:31:07,114 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 18:31:07,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-12 18:31:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 18:31:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-10-12 18:31:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 18:31:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2020-10-12 18:31:07,142 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 41 [2020-10-12 18:31:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:07,144 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2020-10-12 18:31:07,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 18:31:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2020-10-12 18:31:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 18:31:07,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:07,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:07,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 18:31:07,149 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1430951604, now seen corresponding path program 1 times [2020-10-12 18:31:07,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:07,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807028787] [2020-10-12 18:31:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:07,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:07,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:12,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 18:31:12,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 18:31:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 18:31:12,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 18:31:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 18:31:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 18:31:12,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 18:31:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:12,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:12,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:12,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:31:12,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:12,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:12,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 18:31:12,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:31:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 18:31:12,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 18:31:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:12,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:12,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:12,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-12 18:31:12,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:12,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:12,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:12,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 18:31:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:12,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 18:31:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:12,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:12,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-12 18:31:12,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 18:31:12,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:31:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 18:31:12,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 18:31:12,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807028787] [2020-10-12 18:31:12,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:12,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 18:31:12,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619847813] [2020-10-12 18:31:12,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 18:31:12,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 18:31:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 18:31:12,643 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 13 states. [2020-10-12 18:31:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:13,475 INFO L93 Difference]: Finished difference Result 115 states and 167 transitions. [2020-10-12 18:31:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 18:31:13,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-12 18:31:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:13,480 INFO L225 Difference]: With dead ends: 115 [2020-10-12 18:31:13,480 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 18:31:13,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-12 18:31:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 18:31:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-12 18:31:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 18:31:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2020-10-12 18:31:13,510 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 41 [2020-10-12 18:31:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:13,511 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2020-10-12 18:31:13,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 18:31:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2020-10-12 18:31:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:13,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:13,519 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:13,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 18:31:13,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:13,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1048726581, now seen corresponding path program 3 times [2020-10-12 18:31:13,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:13,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262823052] [2020-10-12 18:31:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:13,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:13,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:17,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:17,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:31:17,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 18:31:17,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4270 [2020-10-12 18:31:17,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:31:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 18:31:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 18:31:17,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:17,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:17,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:17,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:17,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:31:17,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:17,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:17,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:17,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:17,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-12 18:31:17,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:17,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 18:31:17,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:31:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:18,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:18,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:18,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:18,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 18:31:18,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:31:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:18,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:31:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:18,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:18,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:18,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:18,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 18:31:18,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:31:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-12 18:31:18,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262823052] [2020-10-12 18:31:18,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:18,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 18:31:18,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81528749] [2020-10-12 18:31:18,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 18:31:18,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:18,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 18:31:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 18:31:18,376 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand 13 states. [2020-10-12 18:31:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:18,985 INFO L93 Difference]: Finished difference Result 113 states and 192 transitions. [2020-10-12 18:31:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 18:31:18,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-12 18:31:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:18,995 INFO L225 Difference]: With dead ends: 113 [2020-10-12 18:31:18,995 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 18:31:18,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-12 18:31:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 18:31:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-12 18:31:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 18:31:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 135 transitions. [2020-10-12 18:31:19,062 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 135 transitions. Word has length 50 [2020-10-12 18:31:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:19,063 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 135 transitions. [2020-10-12 18:31:19,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 18:31:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 135 transitions. [2020-10-12 18:31:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:19,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:19,067 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:19,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 18:31:19,068 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:19,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1728784951, now seen corresponding path program 2 times [2020-10-12 18:31:19,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:19,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546259638] [2020-10-12 18:31:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:19,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:23,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:23,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:23,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:24,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:31:24,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 18:31:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 18:31:24,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:31:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:31:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 18:31:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:24,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:24,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:24,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:31:24,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:24,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:24,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:24,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:24,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:24,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 18:31:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:31:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:24,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:31:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:24,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:24,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:24,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 18:31:24,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 18:31:24,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:31:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:24,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:25,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:31:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:25,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:25,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:25,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:25,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 18:31:25,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:25,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 18:31:25,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546259638] [2020-10-12 18:31:25,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:25,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 18:31:25,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177643888] [2020-10-12 18:31:25,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 18:31:25,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 18:31:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-12 18:31:25,481 INFO L87 Difference]: Start difference. First operand 86 states and 135 transitions. Second operand 24 states. [2020-10-12 18:31:26,663 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 18:31:28,167 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-12 18:31:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:29,790 INFO L93 Difference]: Finished difference Result 275 states and 525 transitions. [2020-10-12 18:31:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 18:31:29,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-12 18:31:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:29,800 INFO L225 Difference]: With dead ends: 275 [2020-10-12 18:31:29,800 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 18:31:29,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=432, Invalid=2990, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 18:31:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 18:31:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 143. [2020-10-12 18:31:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 18:31:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 279 transitions. [2020-10-12 18:31:29,898 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 279 transitions. Word has length 50 [2020-10-12 18:31:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:29,899 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 279 transitions. [2020-10-12 18:31:29,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 18:31:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 279 transitions. [2020-10-12 18:31:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:29,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:29,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:29,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 18:31:29,904 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1323012681, now seen corresponding path program 3 times [2020-10-12 18:31:29,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:29,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591346371] [2020-10-12 18:31:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:30,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:30,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:32,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:34,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:34,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 18:31:34,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:34,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:34,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:34,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:34,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:34,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 18:31:34,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:35,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:35,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:31:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:31:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:35,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:31:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:35,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:31:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:35,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:35,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:35,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:35,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 18:31:35,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591346371] [2020-10-12 18:31:35,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:35,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 18:31:35,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594649010] [2020-10-12 18:31:35,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 18:31:35,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 18:31:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 18:31:35,492 INFO L87 Difference]: Start difference. First operand 143 states and 279 transitions. Second operand 17 states. [2020-10-12 18:31:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:37,216 INFO L93 Difference]: Finished difference Result 313 states and 585 transitions. [2020-10-12 18:31:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 18:31:37,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-12 18:31:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:37,222 INFO L225 Difference]: With dead ends: 313 [2020-10-12 18:31:37,222 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 18:31:37,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 18:31:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 18:31:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 180. [2020-10-12 18:31:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 18:31:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2020-10-12 18:31:37,268 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 50 [2020-10-12 18:31:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:37,269 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2020-10-12 18:31:37,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 18:31:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2020-10-12 18:31:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:37,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:37,273 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:37,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 18:31:37,273 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1708258103, now seen corresponding path program 4 times [2020-10-12 18:31:37,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:37,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983652457] [2020-10-12 18:31:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:37,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:40,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:41,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:42,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:31:42,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 18:31:42,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 18:31:42,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 18:31:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:31:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 18:31:42,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:42,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:42,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:31:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:42,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:31:42,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:42,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:43,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:31:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:43,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:43,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:43,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 18:31:43,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983652457] [2020-10-12 18:31:43,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:43,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 18:31:43,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158343055] [2020-10-12 18:31:43,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 18:31:43,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 18:31:43,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-12 18:31:43,204 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand 20 states. [2020-10-12 18:31:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:44,888 INFO L93 Difference]: Finished difference Result 322 states and 597 transitions. [2020-10-12 18:31:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 18:31:44,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-12 18:31:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:44,897 INFO L225 Difference]: With dead ends: 322 [2020-10-12 18:31:44,897 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 18:31:44,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 18:31:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 18:31:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 182. [2020-10-12 18:31:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 18:31:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2020-10-12 18:31:44,974 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 50 [2020-10-12 18:31:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:44,974 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2020-10-12 18:31:44,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 18:31:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2020-10-12 18:31:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:44,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:44,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:44,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 18:31:44,981 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash -663481159, now seen corresponding path program 5 times [2020-10-12 18:31:44,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:44,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111681904] [2020-10-12 18:31:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:45,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:48,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:48,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:31:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 18:31:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 18:31:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 18:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:31:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 18:31:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:50,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:31:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:50,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:50,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:31:50,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:50,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:31:50,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:31:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:31:50,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:31:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:31:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:50,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:50,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:50,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 18:31:50,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:31:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:50,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:31:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:50,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:50,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:50,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:31:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-12 18:31:50,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:31:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:31:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:31:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:50,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:31:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:51,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:31:51,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:31:51,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:31:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 18:31:51,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:31:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:31:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:31:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:31:51,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:31:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 18:31:51,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111681904] [2020-10-12 18:31:51,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:31:51,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 18:31:51,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336205313] [2020-10-12 18:31:51,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 18:31:51,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:31:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 18:31:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-12 18:31:51,205 INFO L87 Difference]: Start difference. First operand 182 states and 391 transitions. Second operand 24 states. [2020-10-12 18:31:52,264 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 18:31:54,708 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-12 18:31:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:31:56,240 INFO L93 Difference]: Finished difference Result 377 states and 696 transitions. [2020-10-12 18:31:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 18:31:56,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-12 18:31:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:31:56,249 INFO L225 Difference]: With dead ends: 377 [2020-10-12 18:31:56,249 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 18:31:56,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=436, Invalid=3104, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 18:31:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 18:31:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 193. [2020-10-12 18:31:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 18:31:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-12 18:31:56,300 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 50 [2020-10-12 18:31:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:31:56,300 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-12 18:31:56,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 18:31:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-12 18:31:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:31:56,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:31:56,305 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:31:56,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 18:31:56,306 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:31:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:31:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 16577211, now seen corresponding path program 6 times [2020-10-12 18:31:56,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:31:56,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746543937] [2020-10-12 18:31:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:31:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:31:56,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:57,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:58,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:31:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:00,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 18:32:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:32:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 18:32:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:01,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:01,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:01,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:01,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:01,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:01,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:01,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:01,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:32:01,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 18:32:01,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:32:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:01,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:01,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:02,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:02,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:02,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:02,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:02,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:02,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 18:32:02,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:32:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:02,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 18:32:02,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746543937] [2020-10-12 18:32:02,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:02,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 18:32:02,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298627053] [2020-10-12 18:32:02,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 18:32:02,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 18:32:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-12 18:32:02,581 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 22 states. [2020-10-12 18:32:05,794 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 18:32:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:07,026 INFO L93 Difference]: Finished difference Result 355 states and 700 transitions. [2020-10-12 18:32:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 18:32:07,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 18:32:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:07,034 INFO L225 Difference]: With dead ends: 355 [2020-10-12 18:32:07,034 INFO L226 Difference]: Without dead ends: 279 [2020-10-12 18:32:07,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 18:32:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-12 18:32:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 239. [2020-10-12 18:32:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-12 18:32:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 539 transitions. [2020-10-12 18:32:07,085 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 539 transitions. Word has length 50 [2020-10-12 18:32:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:07,087 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 539 transitions. [2020-10-12 18:32:07,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 18:32:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 539 transitions. [2020-10-12 18:32:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:32:07,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:07,092 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:32:07,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 18:32:07,093 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash 274742649, now seen corresponding path program 7 times [2020-10-12 18:32:07,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:07,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363777599] [2020-10-12 18:32:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:07,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:08,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:08,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:09,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:09,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:12,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:12,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 18:32:12,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:12,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:12,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:12,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:12,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:12,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:12,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:12,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:12,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:12,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:12,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:12,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:12,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:12,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:12,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 18:32:12,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 18:32:13,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363777599] [2020-10-12 18:32:13,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:13,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 18:32:13,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793427895] [2020-10-12 18:32:13,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 18:32:13,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 18:32:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-12 18:32:13,017 INFO L87 Difference]: Start difference. First operand 239 states and 539 transitions. Second operand 19 states. [2020-10-12 18:32:13,788 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-12 18:32:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:16,119 INFO L93 Difference]: Finished difference Result 365 states and 828 transitions. [2020-10-12 18:32:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 18:32:16,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-12 18:32:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:16,127 INFO L225 Difference]: With dead ends: 365 [2020-10-12 18:32:16,127 INFO L226 Difference]: Without dead ends: 358 [2020-10-12 18:32:16,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 18:32:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-12 18:32:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2020-10-12 18:32:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-12 18:32:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 697 transitions. [2020-10-12 18:32:16,189 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 697 transitions. Word has length 50 [2020-10-12 18:32:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:16,190 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 697 transitions. [2020-10-12 18:32:16,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 18:32:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 697 transitions. [2020-10-12 18:32:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:32:16,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:16,196 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:32:16,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 18:32:16,197 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 140729143, now seen corresponding path program 8 times [2020-10-12 18:32:16,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:16,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098503389] [2020-10-12 18:32:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:16,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:16,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:17,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:19,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:21,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:21,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 18:32:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:21,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:21,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:21,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:21,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:21,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:21,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:21,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:21,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:21,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:21,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:21,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:21,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:21,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 18:32:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 18:32:22,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098503389] [2020-10-12 18:32:22,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:22,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 18:32:22,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143539542] [2020-10-12 18:32:22,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 18:32:22,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 18:32:22,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-12 18:32:22,107 INFO L87 Difference]: Start difference. First operand 312 states and 697 transitions. Second operand 22 states. [2020-10-12 18:32:25,992 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-12 18:32:27,542 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2020-10-12 18:32:28,218 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 18:32:28,897 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 18:32:29,888 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 18:32:31,041 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 18:32:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:31,845 INFO L93 Difference]: Finished difference Result 1081 states and 1871 transitions. [2020-10-12 18:32:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-12 18:32:31,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 18:32:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:31,855 INFO L225 Difference]: With dead ends: 1081 [2020-10-12 18:32:31,855 INFO L226 Difference]: Without dead ends: 868 [2020-10-12 18:32:31,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2068, Invalid=9922, Unknown=0, NotChecked=0, Total=11990 [2020-10-12 18:32:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2020-10-12 18:32:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 636. [2020-10-12 18:32:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-10-12 18:32:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1201 transitions. [2020-10-12 18:32:31,999 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1201 transitions. Word has length 50 [2020-10-12 18:32:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:31,999 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 1201 transitions. [2020-10-12 18:32:31,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 18:32:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1201 transitions. [2020-10-12 18:32:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:32:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:32,008 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:32:32,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 18:32:32,009 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -323080717, now seen corresponding path program 9 times [2020-10-12 18:32:32,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:32,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522496510] [2020-10-12 18:32:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:33,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:33,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:34,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:37,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:37,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 18:32:37,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 18:32:37,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:32:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:32:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 18:32:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:37,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:37,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:37,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:37,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:37,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:37,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:37,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:37,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:37,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:32:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 18:32:37,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 18:32:37,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522496510] [2020-10-12 18:32:37,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:37,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 18:32:37,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460958726] [2020-10-12 18:32:37,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 18:32:37,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 18:32:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-12 18:32:37,996 INFO L87 Difference]: Start difference. First operand 636 states and 1201 transitions. Second operand 23 states. [2020-10-12 18:32:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:43,159 INFO L93 Difference]: Finished difference Result 1000 states and 1765 transitions. [2020-10-12 18:32:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 18:32:43,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-12 18:32:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:43,168 INFO L225 Difference]: With dead ends: 1000 [2020-10-12 18:32:43,168 INFO L226 Difference]: Without dead ends: 769 [2020-10-12 18:32:43,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=829, Invalid=4141, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 18:32:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2020-10-12 18:32:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 644. [2020-10-12 18:32:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-12 18:32:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1165 transitions. [2020-10-12 18:32:43,299 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1165 transitions. Word has length 50 [2020-10-12 18:32:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:43,299 INFO L479 AbstractCegarLoop]: Abstraction has 644 states and 1165 transitions. [2020-10-12 18:32:43,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 18:32:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1165 transitions. [2020-10-12 18:32:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:32:43,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:43,306 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:32:43,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 18:32:43,306 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash -457094223, now seen corresponding path program 10 times [2020-10-12 18:32:43,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:43,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956451175] [2020-10-12 18:32:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:43,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:44,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:45,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:48,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:32:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 18:32:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:48,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:48,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:48,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:48,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:48,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:48,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:48,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:48,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:48,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:48,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:48,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:48,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:48,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:48,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:48,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 18:32:48,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 18:32:48,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:32:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:32:48,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:49,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:49,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:49,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:49,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:49,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:49,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 18:32:49,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:49,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:32:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 18:32:49,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956451175] [2020-10-12 18:32:49,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:49,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 18:32:49,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900742384] [2020-10-12 18:32:49,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 18:32:49,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:49,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 18:32:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 18:32:49,377 INFO L87 Difference]: Start difference. First operand 644 states and 1165 transitions. Second operand 16 states. [2020-10-12 18:32:51,841 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 18:32:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:52,114 INFO L93 Difference]: Finished difference Result 1040 states and 1735 transitions. [2020-10-12 18:32:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 18:32:52,116 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-12 18:32:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:52,124 INFO L225 Difference]: With dead ends: 1040 [2020-10-12 18:32:52,125 INFO L226 Difference]: Without dead ends: 853 [2020-10-12 18:32:52,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 18:32:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-10-12 18:32:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 601. [2020-10-12 18:32:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-12 18:32:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 998 transitions. [2020-10-12 18:32:52,279 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 998 transitions. Word has length 50 [2020-10-12 18:32:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:52,280 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 998 transitions. [2020-10-12 18:32:52,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 18:32:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 998 transitions. [2020-10-12 18:32:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:32:52,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:52,293 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:32:52,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 18:32:52,293 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1231078155, now seen corresponding path program 1 times [2020-10-12 18:32:52,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:52,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953888511] [2020-10-12 18:32:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:52,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:52,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:54,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2523 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 18:32:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:32:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:55,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:55,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:32:55,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:55,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:32:55,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:32:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:32:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:55,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:32:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:55,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:55,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:55,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 18:32:55,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:55,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:32:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:55,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:55,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:55,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:55,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 18:32:55,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:55,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:55,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:55,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:55,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:55,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 18:32:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 18:32:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:32:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 18:32:55,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953888511] [2020-10-12 18:32:55,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:32:55,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 18:32:55,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822813793] [2020-10-12 18:32:55,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 18:32:55,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:32:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 18:32:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 18:32:55,409 INFO L87 Difference]: Start difference. First operand 601 states and 998 transitions. Second operand 15 states. [2020-10-12 18:32:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:32:56,345 INFO L93 Difference]: Finished difference Result 924 states and 1732 transitions. [2020-10-12 18:32:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 18:32:56,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-12 18:32:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:32:56,356 INFO L225 Difference]: With dead ends: 924 [2020-10-12 18:32:56,357 INFO L226 Difference]: Without dead ends: 920 [2020-10-12 18:32:56,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-12 18:32:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-10-12 18:32:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 727. [2020-10-12 18:32:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-10-12 18:32:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1242 transitions. [2020-10-12 18:32:56,532 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1242 transitions. Word has length 50 [2020-10-12 18:32:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:32:56,533 INFO L479 AbstractCegarLoop]: Abstraction has 727 states and 1242 transitions. [2020-10-12 18:32:56,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 18:32:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1242 transitions. [2020-10-12 18:32:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 18:32:56,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:32:56,544 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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] [2020-10-12 18:32:56,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 18:32:56,545 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:32:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:32:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1943057035, now seen corresponding path program 1 times [2020-10-12 18:32:56,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:32:56,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118080773] [2020-10-12 18:32:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:32:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:32:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:56,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:56,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:57,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:57,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:57,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:32:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:01,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:33:01,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 18:33:01,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 18:33:01,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:33:01,805 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-12 18:33:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:33:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:33:01,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:33:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:33:01,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:33:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:33:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:33:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:33:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:01,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:33:01,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:33:01,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:33:01,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:33:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 18:33:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:33:02,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:02,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:33:02,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:33:02,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 18:33:02,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 18:33:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 18:33:02,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:33:02,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:33:02,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:33:02,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:33:02,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:33:02,365 ERROR L253 erpolLogProxyWrapper]: Interpolant 3 not inductive [2020-10-12 18:33:02,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 18:33:02,372 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:378) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-12 18:33:02,378 INFO L168 Benchmark]: Toolchain (without parser) took 128054.84 ms. Allocated memory was 145.8 MB in the beginning and 1.1 GB in the end (delta: 906.5 MB). Free memory was 101.7 MB in the beginning and 231.2 MB in the end (delta: -129.6 MB). Peak memory consumption was 776.9 MB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,381 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 91.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,387 INFO L168 Benchmark]: Boogie Preprocessor took 141.44 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.0 MB in the beginning and 178.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,388 INFO L168 Benchmark]: RCFGBuilder took 469.73 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 161.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,391 INFO L168 Benchmark]: TraceAbstraction took 127108.89 ms. Allocated memory was 201.3 MB in the beginning and 1.1 GB in the end (delta: 850.9 MB). Free memory was 160.8 MB in the beginning and 231.2 MB in the end (delta: -70.4 MB). Peak memory consumption was 780.5 MB. Max. memory is 7.1 GB. [2020-10-12 18:33:02,397 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 91.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.44 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.0 MB in the beginning and 178.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 469.73 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 161.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 127108.89 ms. Allocated memory was 201.3 MB in the beginning and 1.1 GB in the end (delta: 850.9 MB). Free memory was 160.8 MB in the beginning and 231.2 MB in the end (delta: -70.4 MB). Peak memory consumption was 780.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...