/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:03:03,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:03:03,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:03:03,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:03:03,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:03:03,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:03:03,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:03:03,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:03:04,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:03:04,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:03:04,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:03:04,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:03:04,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:03:04,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:03:04,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:03:04,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:03:04,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:03:04,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:03:04,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:03:04,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:03:04,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:03:04,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:03:04,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:03:04,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:03:04,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:03:04,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:03:04,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:03:04,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:03:04,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:03:04,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:03:04,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:03:04,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:03:04,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:03:04,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:03:04,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:03:04,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:03:04,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:03:04,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:03:04,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:03:04,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:03:04,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:03:04,058 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 [2020-09-25 09:03:04,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:03:04,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:03:04,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:03:04,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:03:04,109 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:03:04,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:03:04,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:03:04,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:03:04,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:03:04,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:03:04,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:03:04,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:03:04,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:03:04,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:03:04,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:03:04,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:03:04,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:03:04,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:03:04,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:03:04,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:03:04,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:03:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:03:04,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:03:04,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:03:04,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:03:04,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:03:04,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:03:04,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:03:04,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:03:04,116 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:03:04,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:03:04,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:03:04,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:03:04,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:03:04,632 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:03:04,634 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 09:03:04,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc504bd01/da936ba8e2d243419b8a4322bc336408/FLAG70319b1cc [2020-09-25 09:03:05,372 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:03:05,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 09:03:05,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc504bd01/da936ba8e2d243419b8a4322bc336408/FLAG70319b1cc [2020-09-25 09:03:05,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc504bd01/da936ba8e2d243419b8a4322bc336408 [2020-09-25 09:03:05,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:03:05,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:03:05,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:03:05,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:03:05,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:03:05,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:03:05" (1/1) ... [2020-09-25 09:03:05,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:05, skipping insertion in model container [2020-09-25 09:03:05,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:03:05" (1/1) ... [2020-09-25 09:03:05,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:03:05,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:03:06,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:03:06,231 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:03:06,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:03:06,488 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:03:06,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06 WrapperNode [2020-09-25 09:03:06,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:03:06,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:03:06,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:03:06,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:03:06,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (1/1) ... [2020-09-25 09:03:06,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:03:06,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:03:06,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:03:06,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:03:06,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (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 [2020-09-25 09:03:06,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:03:06,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:03:06,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:03:06,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:03:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:03:06,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:03:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:03:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:03:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:03:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:03:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:03:08,113 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:03:08,114 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:03:08,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:03:08 BoogieIcfgContainer [2020-09-25 09:03:08,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:03:08,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:03:08,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:03:08,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:03:08,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:03:05" (1/3) ... [2020-09-25 09:03:08,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:03:08, skipping insertion in model container [2020-09-25 09:03:08,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:03:06" (2/3) ... [2020-09-25 09:03:08,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:03:08, skipping insertion in model container [2020-09-25 09:03:08,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:03:08" (3/3) ... [2020-09-25 09:03:08,133 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-09-25 09:03:08,144 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:03:08,156 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:03:08,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:03:08,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:03:08,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:03:08,216 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:03:08,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:03:08,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:03:08,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:03:08,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:03:08,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:03:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 09:03:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 09:03:08,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:08,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:08,275 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1568421906, now seen corresponding path program 1 times [2020-09-25 09:03:08,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:08,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-25 09:03:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:09,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:09,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:12,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:12,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:12,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:13,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:13,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 09:03:13,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:03:13,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 09:03:13,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:13,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:03:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:03:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 09:03:13,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:03:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:13,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:13,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:13,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:13,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 09:03:13,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:13,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:03:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:03:13,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-25 09:03:13,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:03:13,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:03:13,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193519342] [2020-09-25 09:03:13,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:03:13,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:03:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:03:13,933 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 09:03:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:16,519 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 09:03:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:03:16,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-09-25 09:03:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:16,559 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 09:03:16,559 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 09:03:16,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:03:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 09:03:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 09:03:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 09:03:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 09:03:16,736 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 135 [2020-09-25 09:03:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:16,737 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 09:03:16,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:03:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 09:03:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 09:03:16,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:16,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:16,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:03:16,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1119247929, now seen corresponding path program 1 times [2020-09-25 09:03:16,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:16,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100961900] [2020-09-25 09:03:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:17,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:18,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:20,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:21,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:21,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 09:03:21,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:03:21,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 09:03:21,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:21,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:03:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 09:03:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 09:03:21,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:22,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:22,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:22,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:22,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:22,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:22,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 09:03:22,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:22,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:03:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 09:03:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:22,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:22,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:22,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:03:22,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:22,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 09:03:22,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:22,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:22,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 09:03:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:03:22,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100961900] [2020-09-25 09:03:22,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:22,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:03:22,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136470552] [2020-09-25 09:03:22,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:03:22,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:22,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:03:22,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:03:22,228 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 6 states. [2020-09-25 09:03:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:24,117 INFO L93 Difference]: Finished difference Result 1561 states and 1892 transitions. [2020-09-25 09:03:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:03:24,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2020-09-25 09:03:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:24,124 INFO L225 Difference]: With dead ends: 1561 [2020-09-25 09:03:24,125 INFO L226 Difference]: Without dead ends: 962 [2020-09-25 09:03:24,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:03:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-09-25 09:03:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 932. [2020-09-25 09:03:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-09-25 09:03:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1104 transitions. [2020-09-25 09:03:24,178 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1104 transitions. Word has length 152 [2020-09-25 09:03:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:24,178 INFO L479 AbstractCegarLoop]: Abstraction has 932 states and 1104 transitions. [2020-09-25 09:03:24,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:03:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1104 transitions. [2020-09-25 09:03:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-25 09:03:24,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:24,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:24,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:03:24,184 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash 516365175, now seen corresponding path program 1 times [2020-09-25 09:03:24,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:24,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768225347] [2020-09-25 09:03:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:24,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:24,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:29,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:29,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-25 09:03:29,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:03:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 09:03:29,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:29,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:03:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:03:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 09:03:29,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:29,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:29,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:29,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:29,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:29,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 09:03:29,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:29,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:29,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:29,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:29,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:03:29,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:29,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:29,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:29,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 09:03:29,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-25 09:03:29,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:29,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:29,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 09:03:29,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:03:29,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768225347] [2020-09-25 09:03:29,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:03:29,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:03:29,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076847447] [2020-09-25 09:03:29,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:03:29,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:03:29,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:03:29,530 INFO L87 Difference]: Start difference. First operand 932 states and 1104 transitions. Second operand 7 states. [2020-09-25 09:03:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:32,262 INFO L93 Difference]: Finished difference Result 2694 states and 3298 transitions. [2020-09-25 09:03:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:03:32,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-09-25 09:03:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:32,284 INFO L225 Difference]: With dead ends: 2694 [2020-09-25 09:03:32,285 INFO L226 Difference]: Without dead ends: 1784 [2020-09-25 09:03:32,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:03:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2020-09-25 09:03:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1682. [2020-09-25 09:03:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1682 states. [2020-09-25 09:03:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2003 transitions. [2020-09-25 09:03:32,363 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2003 transitions. Word has length 170 [2020-09-25 09:03:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:32,363 INFO L479 AbstractCegarLoop]: Abstraction has 1682 states and 2003 transitions. [2020-09-25 09:03:32,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:03:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2003 transitions. [2020-09-25 09:03:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 09:03:32,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:32,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:32,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:03:32,372 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1353322846, now seen corresponding path program 1 times [2020-09-25 09:03:32,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:32,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054510088] [2020-09-25 09:03:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:32,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:33,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:33,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:37,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:37,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:03:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:03:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 09:03:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:37,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:37,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:37,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:37,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:37,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:37,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 09:03:37,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:37,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:37,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:37,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:03:37,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:37,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:37,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:37,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 09:03:37,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:37,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:03:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:37,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:37,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:37,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 09:03:37,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:37,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 09:03:37,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:37,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:03:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 09:03:37,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 09:03:37,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054510088] [2020-09-25 09:03:37,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:37,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:03:37,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113725349] [2020-09-25 09:03:37,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:03:37,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:37,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:03:37,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:03:37,865 INFO L87 Difference]: Start difference. First operand 1682 states and 2003 transitions. Second operand 8 states. [2020-09-25 09:03:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:41,356 INFO L93 Difference]: Finished difference Result 5743 states and 7297 transitions. [2020-09-25 09:03:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:03:41,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 186 [2020-09-25 09:03:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:41,385 INFO L225 Difference]: With dead ends: 5743 [2020-09-25 09:03:41,385 INFO L226 Difference]: Without dead ends: 4083 [2020-09-25 09:03:41,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:03:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2020-09-25 09:03:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 3608. [2020-09-25 09:03:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3608 states. [2020-09-25 09:03:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 4524 transitions. [2020-09-25 09:03:41,555 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 4524 transitions. Word has length 186 [2020-09-25 09:03:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:41,556 INFO L479 AbstractCegarLoop]: Abstraction has 3608 states and 4524 transitions. [2020-09-25 09:03:41,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:03:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 4524 transitions. [2020-09-25 09:03:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 09:03:41,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:41,572 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:41,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:03:41,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash 853921109, now seen corresponding path program 1 times [2020-09-25 09:03:41,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:41,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433710042] [2020-09-25 09:03:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:41,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:42,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:46,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:46,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-09-25 09:03:46,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:03:46,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4410 [2020-09-25 09:03:46,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:46,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:46,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:03:46,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 09:03:46,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 09:03:46,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:46,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:03:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:46,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:46,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:46,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:03:46,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:46,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:03:46,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:46,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:03:46,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:03:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:46,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:46,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 09:03:46,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:03:46,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:46,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:03:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:03:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 09:03:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:46,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:03:46,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 09:03:46,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:03:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 09:03:46,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:03:46,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:03:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:03:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:03:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:03:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:03:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 09:03:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433710042] [2020-09-25 09:03:46,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:03:46,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:03:46,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302555622] [2020-09-25 09:03:46,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:03:46,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:03:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:03:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:03:46,290 INFO L87 Difference]: Start difference. First operand 3608 states and 4524 transitions. Second operand 5 states. [2020-09-25 09:03:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:03:48,168 INFO L93 Difference]: Finished difference Result 6724 states and 8474 transitions. [2020-09-25 09:03:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:03:48,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 09:03:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:03:48,192 INFO L225 Difference]: With dead ends: 6724 [2020-09-25 09:03:48,193 INFO L226 Difference]: Without dead ends: 3138 [2020-09-25 09:03:48,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:03:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2020-09-25 09:03:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 2668. [2020-09-25 09:03:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2668 states. [2020-09-25 09:03:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3101 transitions. [2020-09-25 09:03:48,279 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3101 transitions. Word has length 191 [2020-09-25 09:03:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:03:48,280 INFO L479 AbstractCegarLoop]: Abstraction has 2668 states and 3101 transitions. [2020-09-25 09:03:48,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:03:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3101 transitions. [2020-09-25 09:03:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-25 09:03:48,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:03:48,290 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:03:48,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:03:48,290 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:03:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:03:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2005344079, now seen corresponding path program 1 times [2020-09-25 09:03:48,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:03:48,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507015533] [2020-09-25 09:03:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:03:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:03:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:03:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking...