/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/Problem01_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:00:09,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:00:09,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:00:09,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:00:09,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:00:09,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:00:09,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:00:09,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:00:09,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:00:09,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:00:09,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:00:09,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:00:09,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:00:09,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:00:09,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:00:09,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:00:09,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:00:09,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:00:09,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:00:09,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:00:09,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:00:09,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:00:09,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:00:09,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:00:09,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:00:09,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:00:09,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:00:09,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:00:09,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:00:09,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:00:09,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:00:09,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:00:09,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:00:09,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:00:09,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:00:09,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:00:09,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:00:09,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:00:09,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:00:09,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:00:09,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:00:09,641 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 09:00:09,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:00:09,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:00:09,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:00:09,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:00:09,696 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:00:09,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:00:09,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:00:09,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:00:09,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:00:09,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:00:09,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:00:09,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:00:09,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:00:09,700 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:00:09,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:00:09,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:00:09,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:00:09,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:00:09,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:00:09,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:00:09,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:00:09,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:00:09,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:00:09,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:00:09,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:00:09,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:00:09,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:00:09,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:00:09,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:00:09,703 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 09:00:10,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:00:10,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:00:10,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:00:10,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:00:10,175 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:00:10,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-25 09:00:10,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff8be8401/4176690305274236bd878dc724c526fa/FLAG53c1e380b [2020-09-25 09:00:10,944 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:00:10,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-25 09:00:10,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff8be8401/4176690305274236bd878dc724c526fa/FLAG53c1e380b [2020-09-25 09:00:11,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff8be8401/4176690305274236bd878dc724c526fa [2020-09-25 09:00:11,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:00:11,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:00:11,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:00:11,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:00:11,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:00:11,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:00:11" (1/1) ... [2020-09-25 09:00:11,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f499f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:11, skipping insertion in model container [2020-09-25 09:00:11,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:00:11" (1/1) ... [2020-09-25 09:00:11,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:00:11,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:00:11,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:00:11,869 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:00:12,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:00:12,050 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:00:12,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12 WrapperNode [2020-09-25 09:00:12,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:00:12,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:00:12,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:00:12,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:00:12,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (1/1) ... [2020-09-25 09:00:12,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:00:12,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:00:12,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:00:12,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:00:12,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (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 09:00:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:00:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:00:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:00:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:00:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:00:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:00:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:00:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:00:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:00:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:00:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:00:13,653 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:00:13,654 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:00:13,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:00:13 BoogieIcfgContainer [2020-09-25 09:00:13,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:00:13,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:00:13,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:00:13,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:00:13,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:00:11" (1/3) ... [2020-09-25 09:00:13,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e56ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:00:13, skipping insertion in model container [2020-09-25 09:00:13,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:12" (2/3) ... [2020-09-25 09:00:13,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e56ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:00:13, skipping insertion in model container [2020-09-25 09:00:13,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:00:13" (3/3) ... [2020-09-25 09:00:13,685 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label22.c [2020-09-25 09:00:13,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:00:13,716 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:00:13,739 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:00:13,781 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:00:13,782 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:00:13,782 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:00:13,783 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:00:13,783 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:00:13,783 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:00:13,783 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:00:13,783 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:00:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 09:00:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-25 09:00:13,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:13,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:00:13,843 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1844135333, now seen corresponding path program 1 times [2020-09-25 09:00:13,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:13,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104135349] [2020-09-25 09:00:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:14,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:14,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:15,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:18,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:19,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:19,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 09:00:19,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:00:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 09:00:19,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:19,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:19,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:00:19,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:00:19,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-09-25 09:00:19,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:00:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:19,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:19,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:19,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 09:00:19,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:19,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:00:19,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:19,494 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 09:00:19,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104135349] [2020-09-25 09:00:19,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:00:19,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:00:19,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550573857] [2020-09-25 09:00:19,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:00:19,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:19,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:00:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:00:19,540 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 09:00:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:21,955 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 09:00:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:00:21,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-09-25 09:00:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:21,983 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 09:00:21,983 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 09:00:21,995 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 09:00:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 09:00:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 09:00:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 09:00:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 09:00:22,129 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 155 [2020-09-25 09:00:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:22,130 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 09:00:22,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:00:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 09:00:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 09:00:22,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:22,146 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 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 09:00:22,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:00:22,147 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:22,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1778459773, now seen corresponding path program 1 times [2020-09-25 09:00:22,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:22,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747020245] [2020-09-25 09:00:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:22,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:22,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:27,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:27,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-25 09:00:27,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:00:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-09-25 09:00:27,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:27,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:00:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 09:00:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 09:00:27,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:27,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:27,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:27,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:27,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:00:27,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:27,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:00:27,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:27,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:27,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:27,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 09:00:27,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:27,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:00:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:00:27,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747020245] [2020-09-25 09:00:27,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:00:27,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:00:27,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469854003] [2020-09-25 09:00:27,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:00:27,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:00:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:00:27,540 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 7 states. [2020-09-25 09:00:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:29,830 INFO L93 Difference]: Finished difference Result 1538 states and 1910 transitions. [2020-09-25 09:00:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:00:29,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2020-09-25 09:00:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:29,843 INFO L225 Difference]: With dead ends: 1538 [2020-09-25 09:00:29,843 INFO L226 Difference]: Without dead ends: 959 [2020-09-25 09:00:29,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:00:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-09-25 09:00:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 901. [2020-09-25 09:00:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 901 states. [2020-09-25 09:00:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1108 transitions. [2020-09-25 09:00:29,924 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1108 transitions. Word has length 176 [2020-09-25 09:00:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:29,926 INFO L479 AbstractCegarLoop]: Abstraction has 901 states and 1108 transitions. [2020-09-25 09:00:29,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:00:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1108 transitions. [2020-09-25 09:00:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 09:00:29,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:29,934 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, 1, 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 09:00:29,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:00:29,935 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1702754775, now seen corresponding path program 1 times [2020-09-25 09:00:29,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:29,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614992398] [2020-09-25 09:00:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:30,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:31,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:34,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 09:00:34,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:00:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 09:00:34,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:34,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:00:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:00:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 09:00:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:00:35,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:35,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:35,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:35,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:00:35,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:35,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:00:35,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:35,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:35,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:35,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:35,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 09:00:35,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:35,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 09:00:35,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:35,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:35,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:35,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:35,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 09:00:35,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:00:35,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614992398] [2020-09-25 09:00:35,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:00:35,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:00:35,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012709732] [2020-09-25 09:00:35,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:00:35,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:00:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:00:35,278 INFO L87 Difference]: Start difference. First operand 901 states and 1108 transitions. Second operand 7 states. [2020-09-25 09:00:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:37,741 INFO L93 Difference]: Finished difference Result 2569 states and 3321 transitions. [2020-09-25 09:00:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:00:37,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2020-09-25 09:00:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:37,751 INFO L225 Difference]: With dead ends: 2569 [2020-09-25 09:00:37,751 INFO L226 Difference]: Without dead ends: 1692 [2020-09-25 09:00:37,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:00:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2020-09-25 09:00:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1575. [2020-09-25 09:00:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2020-09-25 09:00:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1951 transitions. [2020-09-25 09:00:37,846 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1951 transitions. Word has length 177 [2020-09-25 09:00:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:37,847 INFO L479 AbstractCegarLoop]: Abstraction has 1575 states and 1951 transitions. [2020-09-25 09:00:37,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:00:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1951 transitions. [2020-09-25 09:00:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-25 09:00:37,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:37,859 INFO L422 BasicCegarLoop]: trace histogram [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, 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 09:00:37,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:00:37,860 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:37,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1433668401, now seen corresponding path program 1 times [2020-09-25 09:00:37,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:37,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914442147] [2020-09-25 09:00:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:37,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:38,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:42,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:42,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-09-25 09:00:42,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:00:42,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-25 09:00:42,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:42,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:42,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:00:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-25 09:00:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 09:00:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:43,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:43,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:43,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 09:00:43,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:43,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:43,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:43,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:43,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:43,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:00:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:43,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 09:00:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:43,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 09:00:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:43,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:00:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 09:00:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 09:00:43,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914442147] [2020-09-25 09:00:43,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:43,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:00:43,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195565582] [2020-09-25 09:00:43,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:00:43,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:00:43,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:00:43,736 INFO L87 Difference]: Start difference. First operand 1575 states and 1951 transitions. Second operand 9 states. [2020-09-25 09:00:46,665 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-09-25 09:00:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:46,801 INFO L93 Difference]: Finished difference Result 3232 states and 4078 transitions. [2020-09-25 09:00:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:00:46,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 207 [2020-09-25 09:00:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:46,811 INFO L225 Difference]: With dead ends: 3232 [2020-09-25 09:00:46,812 INFO L226 Difference]: Without dead ends: 1580 [2020-09-25 09:00:46,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:00:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2020-09-25 09:00:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1570. [2020-09-25 09:00:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1570 states. [2020-09-25 09:00:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1942 transitions. [2020-09-25 09:00:46,874 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1942 transitions. Word has length 207 [2020-09-25 09:00:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:46,875 INFO L479 AbstractCegarLoop]: Abstraction has 1570 states and 1942 transitions. [2020-09-25 09:00:46,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:00:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1942 transitions. [2020-09-25 09:00:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-25 09:00:46,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:46,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:00:46,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:00:46,885 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash 936057003, now seen corresponding path program 1 times [2020-09-25 09:00:46,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:46,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028579095] [2020-09-25 09:00:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:51,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:51,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:51,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:51,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-09-25 09:00:51,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:00:51,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-09-25 09:00:51,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:51,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:51,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-09-25 09:00:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 09:00:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:52,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:52,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:52,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:52,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:00:52,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:52,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:52,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:00:52,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:52,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:52,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:52,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:00:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:52,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 09:00:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:52,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:52,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:00:52,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:00:52,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:52,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:52,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:52,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:52,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 09:00:52,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 09:00:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:52,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:52,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:52,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 09:00:52,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:52,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:00:52,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 09:00:52,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028579095] [2020-09-25 09:00:52,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:52,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:00:52,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313044124] [2020-09-25 09:00:52,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:00:52,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:00:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:00:52,355 INFO L87 Difference]: Start difference. First operand 1570 states and 1942 transitions. Second operand 7 states. [2020-09-25 09:00:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:54,812 INFO L93 Difference]: Finished difference Result 4249 states and 5419 transitions. [2020-09-25 09:00:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:00:54,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 214 [2020-09-25 09:00:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:54,829 INFO L225 Difference]: With dead ends: 4249 [2020-09-25 09:00:54,829 INFO L226 Difference]: Without dead ends: 2703 [2020-09-25 09:00:54,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:00:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2020-09-25 09:00:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2150. [2020-09-25 09:00:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2150 states. [2020-09-25 09:00:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2764 transitions. [2020-09-25 09:00:54,917 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2764 transitions. Word has length 214 [2020-09-25 09:00:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:54,917 INFO L479 AbstractCegarLoop]: Abstraction has 2150 states and 2764 transitions. [2020-09-25 09:00:54,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:00:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2764 transitions. [2020-09-25 09:00:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-25 09:00:54,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:54,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:54,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:00:54,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash 134521756, now seen corresponding path program 1 times [2020-09-25 09:00:54,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:54,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915449074] [2020-09-25 09:00:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:55,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:55,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking...