/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=LOWLEXORDER --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/Problem01_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:51,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:51,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:51,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:51,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:51,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:51,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:51,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:51,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:51,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:51,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:51,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:51,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:51,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:51,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:51,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:51,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:51,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:51,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:51,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:51,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:51,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:51,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:51,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:51,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:51,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:51,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:51,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:51,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:51,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:51,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:51,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:51,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:51,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:51,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:51,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:51,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:51,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:51,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:51,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:51,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:51,726 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 [2020-09-24 21:39:51,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:51,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:51,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:51,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:51,779 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:51,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:51,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:51,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:51,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:51,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:51,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:51,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:51,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:51,782 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:51,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:51,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:51,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:51,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:51,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:51,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:51,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:51,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:51,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:51,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:51,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:51,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:51,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:51,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:51,786 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:39:52,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:52,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:52,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:52,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:52,284 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:52,286 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-24 21:39:52,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1c3fbeda/750dc06551b448b8b17b53fb09b2f8f4/FLAG332f1e4be [2020-09-24 21:39:53,028 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:53,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-24 21:39:53,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1c3fbeda/750dc06551b448b8b17b53fb09b2f8f4/FLAG332f1e4be [2020-09-24 21:39:53,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1c3fbeda/750dc06551b448b8b17b53fb09b2f8f4 [2020-09-24 21:39:53,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:53,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:53,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:53,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:53,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:53,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:53" (1/1) ... [2020-09-24 21:39:53,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2c32e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:53, skipping insertion in model container [2020-09-24 21:39:53,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:53" (1/1) ... [2020-09-24 21:39:53,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:53,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:53,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:53,902 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:54,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:54,169 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:54,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54 WrapperNode [2020-09-24 21:39:54,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:54,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:54,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:54,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:54,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (1/1) ... [2020-09-24 21:39:54,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:54,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:54,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:54,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:54,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (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 [2020-09-24 21:39:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:55,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:55,831 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:55,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:55 BoogieIcfgContainer [2020-09-24 21:39:55,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:55,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:55,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:55,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:55,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:53" (1/3) ... [2020-09-24 21:39:55,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe95611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:55, skipping insertion in model container [2020-09-24 21:39:55,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:54" (2/3) ... [2020-09-24 21:39:55,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe95611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:55, skipping insertion in model container [2020-09-24 21:39:55,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:55" (3/3) ... [2020-09-24 21:39:55,851 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label41.c [2020-09-24 21:39:55,863 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:55,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:55,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:55,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:55,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:55,933 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:55,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:55,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:55,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:55,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:55,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 21:39:55,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:55,988 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] [2020-09-24 21:39:55,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -672460611, now seen corresponding path program 1 times [2020-09-24 21:39:56,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:56,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350103640] [2020-09-24 21:39:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:56,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:01,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-09-24 21:40:01,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:40:01,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:01,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:02,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:02,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:02,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-24 21:40:02,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:02,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:02,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:02,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350103640] [2020-09-24 21:40:02,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:02,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 21:40:02,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640160998] [2020-09-24 21:40:02,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:40:02,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:02,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:40:02,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:40:02,733 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 19 states. [2020-09-24 21:40:03,002 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-09-24 21:40:03,251 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-09-24 21:40:03,453 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-09-24 21:40:03,695 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-09-24 21:40:03,945 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-24 21:40:04,238 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-09-24 21:40:04,784 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:40:05,851 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-09-24 21:40:06,405 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-09-24 21:40:08,300 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:40:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:11,158 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:40:11,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2020-09-24 21:40:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:11,190 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:11,190 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:11,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:40:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1149 transitions. [2020-09-24 21:40:11,327 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1149 transitions. Word has length 113 [2020-09-24 21:40:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:11,328 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1149 transitions. [2020-09-24 21:40:11,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:40:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1149 transitions. [2020-09-24 21:40:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-24 21:40:11,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:11,339 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:11,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:11,339 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1544605760, now seen corresponding path program 1 times [2020-09-24 21:40:11,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:11,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565902367] [2020-09-24 21:40:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:15,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:16,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:16,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 21:40:16,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:40:16,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:40:16,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:40:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:16,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:17,041 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-09-24 21:40:17,170 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-09-24 21:40:17,364 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-09-24 21:40:17,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:17,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 21:40:17,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:17,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:17,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:18,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:18,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:18,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:18,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 21:40:18,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:18,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:18,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565902367] [2020-09-24 21:40:18,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:18,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:40:18,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325463374] [2020-09-24 21:40:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:40:18,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:40:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:40:18,674 INFO L87 Difference]: Start difference. First operand 985 states and 1149 transitions. Second operand 22 states. [2020-09-24 21:40:19,599 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-09-24 21:40:19,947 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2020-09-24 21:40:21,004 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2020-09-24 21:40:21,309 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-09-24 21:40:21,619 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-09-24 21:40:21,937 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-09-24 21:40:22,301 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 103 [2020-09-24 21:40:23,055 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-09-24 21:40:23,609 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-09-24 21:40:24,440 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2020-09-24 21:40:25,002 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2020-09-24 21:40:25,501 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-09-24 21:40:26,032 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-09-24 21:40:26,479 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 90 [2020-09-24 21:40:26,854 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2020-09-24 21:40:27,137 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-09-24 21:40:27,543 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-09-24 21:40:27,910 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2020-09-24 21:40:28,199 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-09-24 21:40:28,572 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-09-24 21:40:29,243 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2020-09-24 21:40:29,888 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 91 [2020-09-24 21:40:30,247 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2020-09-24 21:40:30,903 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-09-24 21:40:31,392 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-09-24 21:40:31,829 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-09-24 21:40:32,110 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-09-24 21:40:32,410 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-09-24 21:40:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:34,280 INFO L93 Difference]: Finished difference Result 2502 states and 3007 transitions. [2020-09-24 21:40:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 21:40:34,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 130 [2020-09-24 21:40:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:34,295 INFO L225 Difference]: With dead ends: 2502 [2020-09-24 21:40:34,295 INFO L226 Difference]: Without dead ends: 1605 [2020-09-24 21:40:34,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1150, Invalid=3140, Unknown=0, NotChecked=0, Total=4290 [2020-09-24 21:40:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2020-09-24 21:40:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1363. [2020-09-24 21:40:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2020-09-24 21:40:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1592 transitions. [2020-09-24 21:40:34,359 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1592 transitions. Word has length 130 [2020-09-24 21:40:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:34,360 INFO L479 AbstractCegarLoop]: Abstraction has 1363 states and 1592 transitions. [2020-09-24 21:40:34,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:40:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1592 transitions. [2020-09-24 21:40:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-24 21:40:34,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:34,365 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:34,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:34,365 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1425470158, now seen corresponding path program 1 times [2020-09-24 21:40:34,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:34,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90193866] [2020-09-24 21:40:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:34,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:35,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:35,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 21:40:35,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:40:35,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-09-24 21:40:35,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:40:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 21:40:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:36,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:36,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:36,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 21:40:36,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:36,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:40:36,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:36,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:36,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 21:40:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:40:36,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90193866] [2020-09-24 21:40:36,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:36,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:40:36,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903917455] [2020-09-24 21:40:36,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:40:36,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:36,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:40:36,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:40:36,305 INFO L87 Difference]: Start difference. First operand 1363 states and 1592 transitions. Second operand 6 states. [2020-09-24 21:40:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:38,091 INFO L93 Difference]: Finished difference Result 3209 states and 3896 transitions. [2020-09-24 21:40:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:40:38,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-09-24 21:40:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:38,104 INFO L225 Difference]: With dead ends: 3209 [2020-09-24 21:40:38,104 INFO L226 Difference]: Without dead ends: 1934 [2020-09-24 21:40:38,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:40:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-09-24 21:40:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1878. [2020-09-24 21:40:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2020-09-24 21:40:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2238 transitions. [2020-09-24 21:40:38,173 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2238 transitions. Word has length 134 [2020-09-24 21:40:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:38,174 INFO L479 AbstractCegarLoop]: Abstraction has 1878 states and 2238 transitions. [2020-09-24 21:40:38,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:40:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2238 transitions. [2020-09-24 21:40:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:40:38,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:38,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:40:38,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:38,181 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:38,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2017383104, now seen corresponding path program 1 times [2020-09-24 21:40:38,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:38,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504043200] [2020-09-24 21:40:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:38,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:38,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:42,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-24 21:40:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:40:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:40:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:40:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 21:40:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:43,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:43,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:43,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:43,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:43,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:40:43,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:43,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:40:43,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:43,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:43,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:43,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:43,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:43,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:40:43,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:43,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:43,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:40:43,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:40:43,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:40:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:43,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504043200] [2020-09-24 21:40:43,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:43,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:40:43,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129981702] [2020-09-24 21:40:43,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:40:43,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:40:43,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:40:43,701 INFO L87 Difference]: Start difference. First operand 1878 states and 2238 transitions. Second operand 10 states.