/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:18:58,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:18:58,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:18:58,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:18:58,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:18:58,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:18:58,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:18:58,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:18:58,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:18:58,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:18:58,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:18:58,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:18:58,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:18:58,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:18:58,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:18:58,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:18:58,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:18:58,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:18:58,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:18:58,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:18:58,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:18:58,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:18:58,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:18:58,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:18:58,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:18:58,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:18:58,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:18:58,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:18:58,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:18:58,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:18:58,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:18:58,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:18:58,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:18:58,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:18:58,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:18:58,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:18:58,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:18:58,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:18:58,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:18:58,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:18:58,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:18:58,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:18:58,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:18:58,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:18:58,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:18:58,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:18:58,861 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:18:58,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:18:58,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:18:58,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:18:58,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:18:58,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:18:58,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:18:58,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:18:58,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:18:58,863 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:18:58,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:18:58,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:18:58,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:18:58,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:18:58,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:18:58,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:18:58,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:18:58,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:18:58,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:18:58,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:18:58,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:18:58,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:18:58,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:18:58,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:18:58,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:18:58,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:18:59,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:18:59,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:18:59,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:18:59,299 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:18:59,300 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:18:59,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2020-10-28 15:18:59,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/753441fdf/f08a5bdbd1534149a952b317ecab4a81/FLAGa87534068 [2020-10-28 15:19:00,107 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:19:00,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum_array-2.i [2020-10-28 15:19:00,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/753441fdf/f08a5bdbd1534149a952b317ecab4a81/FLAGa87534068 [2020-10-28 15:19:00,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/753441fdf/f08a5bdbd1534149a952b317ecab4a81 [2020-10-28 15:19:00,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:19:00,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:19:00,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:00,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:19:00,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:19:00,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656cb8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00, skipping insertion in model container [2020-10-28 15:19:00,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:19:00,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:19:00,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:00,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:19:00,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:00,830 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:19:00,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00 WrapperNode [2020-10-28 15:19:00,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:00,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:19:00,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:19:00,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:19:00,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... [2020-10-28 15:19:00,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:19:00,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:19:00,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:19:00,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:19:00,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:19:00,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:19:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:19:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:19:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:19:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:19:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:19:00,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:19:00,973 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:19:00,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:19:00,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:19:00,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:19:00,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:19:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:19:01,622 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:19:01,622 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 15:19:01,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:01 BoogieIcfgContainer [2020-10-28 15:19:01,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:19:01,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:19:01,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:19:01,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:19:01,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:19:00" (1/3) ... [2020-10-28 15:19:01,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6e950e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:01, skipping insertion in model container [2020-10-28 15:19:01,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:00" (2/3) ... [2020-10-28 15:19:01,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6e950e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:01, skipping insertion in model container [2020-10-28 15:19:01,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:01" (3/3) ... [2020-10-28 15:19:01,634 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-10-28 15:19:01,646 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:19:01,651 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:19:01,665 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:19:01,693 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:19:01,693 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:19:01,693 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:19:01,693 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:19:01,694 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:19:01,694 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:19:01,694 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:19:01,694 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:19:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 15:19:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:19:01,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:01,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:01,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1848097440, now seen corresponding path program 1 times [2020-10-28 15:19:01,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:01,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928117652] [2020-10-28 15:19:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:02,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:19:02,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:19:02,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-28 15:19:02,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:02,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:19:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:02,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:19:02,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:02,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:02,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:02,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:02,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928117652] [2020-10-28 15:19:02,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:02,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:19:02,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505787115] [2020-10-28 15:19:02,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:19:02,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:02,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:19:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:19:02,435 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 15:19:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:02,549 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-28 15:19:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:19:02,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-28 15:19:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:02,559 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:19:02,559 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:19:02,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:19:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:19:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:19:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:19:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 15:19:02,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-28 15:19:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:02,606 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 15:19:02,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:19:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 15:19:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:19:02,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:02,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:02,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:19:02,608 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash -164598074, now seen corresponding path program 1 times [2020-10-28 15:19:02,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:02,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135583301] [2020-10-28 15:19:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:03,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:03,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:19:03,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:19:03,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 15:19:03,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:03,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:03,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:19:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:19:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:03,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:03,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:03,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:03,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:19:03,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:03,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:03,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:03,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:03,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:03,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135583301] [2020-10-28 15:19:03,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:03,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:19:03,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887359115] [2020-10-28 15:19:03,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:19:03,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:19:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:19:03,638 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 15:19:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:03,841 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-28 15:19:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:19:03,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:19:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:03,844 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:19:03,845 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:19:03,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:19:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:19:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-28 15:19:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:19:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 15:19:03,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2020-10-28 15:19:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:03,860 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 15:19:03,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:19:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 15:19:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:19:03,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:03,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:03,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:19:03,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:03,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1645912394, now seen corresponding path program 1 times [2020-10-28 15:19:03,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:03,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841798827] [2020-10-28 15:19:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:04,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:08,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:08,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:19:08,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:19:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:19:08,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:08,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:19:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:19:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:09,374 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 26 [2020-10-28 15:19:09,731 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 45 [2020-10-28 15:19:09,882 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-28 15:19:10,048 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2020-10-28 15:19:10,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:10,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:10,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:10,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:10,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:19:10,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:10,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:10,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:19:10,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841798827] [2020-10-28 15:19:10,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:10,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:19:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434337199] [2020-10-28 15:19:10,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:19:10,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:19:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:19:10,168 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-10-28 15:19:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:10,773 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-28 15:19:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:19:10,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 15:19:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:10,776 INFO L225 Difference]: With dead ends: 57 [2020-10-28 15:19:10,776 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:19:10,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:19:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:19:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-28 15:19:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:19:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-28 15:19:10,786 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-10-28 15:19:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:10,787 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-28 15:19:10,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:19:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-28 15:19:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:19:10,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:10,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:10,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:19:10,789 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2117082328, now seen corresponding path program 2 times [2020-10-28 15:19:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:10,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438891571] [2020-10-28 15:19:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:10,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:11,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:12,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:15,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:15,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:19:15,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:19:15,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 15:19:15,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:15,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:19:15,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:19:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 15:19:16,454 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-28 15:19:16,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:16,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:16,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:19:16,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438891571] [2020-10-28 15:19:16,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:16,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:19:16,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852266495] [2020-10-28 15:19:16,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:19:16,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:16,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:19:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:19:16,573 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-10-28 15:19:16,989 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-28 15:19:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:17,196 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-28 15:19:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:19:17,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:19:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:17,198 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:19:17,200 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 15:19:17,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:19:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 15:19:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-28 15:19:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:19:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-28 15:19:17,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 29 [2020-10-28 15:19:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:17,219 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-28 15:19:17,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:19:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-28 15:19:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:19:17,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:17,221 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 15:19:17,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:19:17,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1494491006, now seen corresponding path program 1 times [2020-10-28 15:19:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:17,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675948374] [2020-10-28 15:19:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:17,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:17,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:17,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:18,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:19:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:19:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:22,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:22,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:22,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:22,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:22,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:22,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:19:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:22,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:19:22,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:22,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:22,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:22,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:22,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:19:22,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:19:22,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675948374] [2020-10-28 15:19:22,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:22,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:19:22,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921104251] [2020-10-28 15:19:22,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:19:22,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:19:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:19:22,462 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 8 states. [2020-10-28 15:19:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:22,726 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-10-28 15:19:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:19:22,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 15:19:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:22,728 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:19:22,728 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:19:22,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:19:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:19:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-28 15:19:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:19:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-28 15:19:22,739 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-28 15:19:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:22,739 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-28 15:19:22,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:19:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-28 15:19:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:19:22,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:22,741 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] [2020-10-28 15:19:22,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:19:22,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2056319964, now seen corresponding path program 2 times [2020-10-28 15:19:22,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:22,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963943282] [2020-10-28 15:19:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:26,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:27,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:27,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:19:27,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:19:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:28,511 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-10-28 15:19:28,677 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-28 15:19:28,957 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 15:19:29,206 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-28 15:19:29,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:29,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:29,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:29,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:29,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:29,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:29,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 15:19:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:29,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:19:29,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:19:29,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:19:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963943282] [2020-10-28 15:19:29,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:29,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:19:29,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716166205] [2020-10-28 15:19:29,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:19:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:19:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:19:29,404 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-10-28 15:19:30,119 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-28 15:19:30,475 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 15:19:30,794 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2020-10-28 15:19:31,088 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-28 15:19:31,337 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-28 15:19:31,799 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-28 15:19:31,974 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-28 15:19:32,396 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-28 15:19:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:32,499 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-28 15:19:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:19:32,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-28 15:19:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:32,503 INFO L225 Difference]: With dead ends: 93 [2020-10-28 15:19:32,503 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:19:32,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:19:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:19:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-28 15:19:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:19:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-28 15:19:32,515 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2020-10-28 15:19:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:32,515 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-28 15:19:32,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:19:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-28 15:19:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:19:32,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:32,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-28 15:19:32,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:19:32,517 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash -184518413, now seen corresponding path program 3 times [2020-10-28 15:19:32,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:32,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782488201] [2020-10-28 15:19:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:33,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:37,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:37,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:19:37,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:19:37,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:38,016 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-28 15:19:38,246 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 43 [2020-10-28 15:19:38,450 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-28 15:19:38,660 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-28 15:19:38,872 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-10-28 15:19:39,245 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2020-10-28 15:19:39,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:39,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:39,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:39,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:39,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 15:19:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:19:39,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:19:39,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:39,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:19:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 15:19:39,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782488201] [2020-10-28 15:19:39,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:39,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:19:39,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792191780] [2020-10-28 15:19:39,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:19:39,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:39,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:19:39,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:19:39,428 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 14 states. [2020-10-28 15:19:39,799 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-28 15:19:40,298 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-28 15:19:40,503 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-28 15:19:40,694 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-28 15:19:40,932 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-28 15:19:41,262 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2020-10-28 15:19:41,433 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-28 15:19:41,739 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:19:42,099 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-28 15:19:42,590 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2020-10-28 15:19:42,839 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-28 15:19:43,143 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2020-10-28 15:19:43,475 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-28 15:19:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:43,485 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-28 15:19:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:19:43,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-28 15:19:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:43,487 INFO L225 Difference]: With dead ends: 85 [2020-10-28 15:19:43,487 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:19:43,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:19:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:19:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-10-28 15:19:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:19:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-28 15:19:43,499 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-10-28 15:19:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:43,499 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-28 15:19:43,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:19:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-28 15:19:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:19:43,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:43,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-28 15:19:43,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:19:43,501 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1285085935, now seen corresponding path program 4 times [2020-10-28 15:19:43,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:43,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509897311] [2020-10-28 15:19:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:43,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:47,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:48,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:19:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:19:48,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:49,011 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 27 [2020-10-28 15:19:49,157 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-28 15:19:49,292 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-10-28 15:19:49,753 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 59 [2020-10-28 15:19:50,070 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 66 [2020-10-28 15:19:50,279 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-28 15:19:50,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:50,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:50,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:50,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:50,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:50,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 15:19:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:50,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:19:50,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:19:50,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509897311] [2020-10-28 15:19:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:50,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:19:50,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855699069] [2020-10-28 15:19:50,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:19:50,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:50,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:19:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:19:50,424 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 14 states. [2020-10-28 15:19:50,712 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 15:19:51,097 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-28 15:19:51,289 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-28 15:19:51,471 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-28 15:19:51,690 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-28 15:19:51,884 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-28 15:19:52,078 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-28 15:19:52,455 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-28 15:19:52,739 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2020-10-28 15:19:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:52,852 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-28 15:19:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:19:52,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-28 15:19:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:52,854 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:19:52,854 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:19:52,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:19:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:19:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-28 15:19:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:19:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-28 15:19:52,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2020-10-28 15:19:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:52,869 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-28 15:19:52,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:19:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-28 15:19:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:19:52,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:52,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:52,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:19:52,870 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash 521311200, now seen corresponding path program 5 times [2020-10-28 15:19:52,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:52,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68444841] [2020-10-28 15:19:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:52,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:53,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:57,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:58,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:19:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:19:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:58,583 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2020-10-28 15:19:58,843 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-28 15:19:59,267 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 33 [2020-10-28 15:19:59,766 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 52 [2020-10-28 15:20:00,188 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 64 [2020-10-28 15:20:00,481 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-10-28 15:20:01,506 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 115 [2020-10-28 15:20:02,265 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 105 [2020-10-28 15:20:03,061 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 81 [2020-10-28 15:20:03,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:03,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:03,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:03,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:03,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 15:20:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:03,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:03,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:03,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:20:03,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:03,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:03,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:20:03,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:03,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:20:03,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 15:20:03,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68444841] [2020-10-28 15:20:03,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:03,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:20:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524643172] [2020-10-28 15:20:03,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:20:03,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:20:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:20:03,297 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 19 states. [2020-10-28 15:20:04,028 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2020-10-28 15:20:04,465 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 57 [2020-10-28 15:20:04,793 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-28 15:20:05,271 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 62 [2020-10-28 15:20:05,799 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-10-28 15:20:06,420 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 102 [2020-10-28 15:20:06,735 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 85 [2020-10-28 15:20:07,093 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 92 [2020-10-28 15:20:07,775 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 88 [2020-10-28 15:20:08,464 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 85 [2020-10-28 15:20:09,205 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 78 [2020-10-28 15:20:09,727 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2020-10-28 15:20:10,218 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 69 [2020-10-28 15:20:11,047 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 109 [2020-10-28 15:20:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:11,299 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2020-10-28 15:20:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:20:11,299 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-28 15:20:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:11,301 INFO L225 Difference]: With dead ends: 157 [2020-10-28 15:20:11,301 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 15:20:11,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:20:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 15:20:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2020-10-28 15:20:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 15:20:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-28 15:20:11,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2020-10-28 15:20:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:11,318 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-28 15:20:11,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:20:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-28 15:20:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:20:11,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:11,319 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:11,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:20:11,319 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1208502982, now seen corresponding path program 6 times [2020-10-28 15:20:11,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:11,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698889319] [2020-10-28 15:20:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:11,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:11,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:16,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:16,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:20:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:16,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:16,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:16,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:16,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:16,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:20:16,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:16,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:16,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:16,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 15:20:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:16,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:20:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:16,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:20:16,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698889319] [2020-10-28 15:20:16,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:16,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:20:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792843297] [2020-10-28 15:20:16,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:20:16,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:20:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:20:16,668 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 12 states. [2020-10-28 15:20:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:17,464 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-28 15:20:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:20:17,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-28 15:20:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:17,473 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:20:17,473 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:20:17,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:20:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:20:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-28 15:20:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:20:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-28 15:20:17,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 57 [2020-10-28 15:20:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:17,484 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-28 15:20:17,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:20:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-28 15:20:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:20:17,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:17,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:17,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:20:17,487 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:17,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1786745960, now seen corresponding path program 7 times [2020-10-28 15:20:17,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:17,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654029719] [2020-10-28 15:20:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:17,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:22,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:20:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:23,047 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-28 15:20:23,174 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-28 15:20:23,308 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-28 15:20:23,441 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-28 15:20:23,604 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-28 15:20:23,752 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-28 15:20:24,209 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 61 [2020-10-28 15:20:27,077 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 172 DAG size of output: 77 [2020-10-28 15:20:28,523 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 183 DAG size of output: 76 [2020-10-28 15:20:29,152 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 53 [2020-10-28 15:20:29,397 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2020-10-28 15:20:29,692 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:20:30,072 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 43 [2020-10-28 15:20:30,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:30,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:30,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:30,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 15:20:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:30,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:30,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:30,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:30,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:20:30,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:30,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:20:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:20:30,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 15:20:30,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654029719] [2020-10-28 15:20:30,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:30,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:20:30,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881679360] [2020-10-28 15:20:30,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:20:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:30,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:20:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:20:30,361 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 19 states. [2020-10-28 15:20:31,774 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-28 15:20:32,043 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-28 15:20:32,440 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2020-10-28 15:20:32,651 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2020-10-28 15:20:32,928 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 53 [2020-10-28 15:20:33,130 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 40 [2020-10-28 15:20:33,396 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 53 [2020-10-28 15:20:33,643 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2020-10-28 15:20:33,991 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-28 15:20:34,179 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-28 15:20:34,645 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 58 [2020-10-28 15:20:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:35,525 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-10-28 15:20:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:20:35,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-28 15:20:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:35,528 INFO L225 Difference]: With dead ends: 131 [2020-10-28 15:20:35,529 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:20:35,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:20:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:20:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-28 15:20:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:20:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-28 15:20:35,549 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 59 [2020-10-28 15:20:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:35,550 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-28 15:20:35,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:20:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-28 15:20:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:20:35,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:35,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:35,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:20:35,553 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash -779558225, now seen corresponding path program 8 times [2020-10-28 15:20:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:35,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740758966] [2020-10-28 15:20:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:35,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:40,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:40,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:20:40,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:20:40,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:41,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:41,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:41,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:41,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:41,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:41,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:41,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 15:20:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:41,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:41,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:41,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:41,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:41,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:20:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:20:41,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740758966] [2020-10-28 15:20:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:20:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376297292] [2020-10-28 15:20:41,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:20:41,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:20:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:20:41,189 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2020-10-28 15:20:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:42,977 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2020-10-28 15:20:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:20:42,978 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 15:20:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:42,980 INFO L225 Difference]: With dead ends: 204 [2020-10-28 15:20:42,980 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 15:20:42,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:20:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 15:20:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 111. [2020-10-28 15:20:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 15:20:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2020-10-28 15:20:43,005 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 62 [2020-10-28 15:20:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:43,005 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2020-10-28 15:20:43,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:20:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2020-10-28 15:20:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 15:20:43,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:43,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:43,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:20:43,007 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:43,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1132787954, now seen corresponding path program 9 times [2020-10-28 15:20:43,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:43,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822219527] [2020-10-28 15:20:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:43,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:48,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:20:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:20:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:54,720 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-10-28 15:20:54,841 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2020-10-28 15:20:54,958 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 22 [2020-10-28 15:20:55,085 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 22 [2020-10-28 15:20:55,275 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-10-28 15:20:55,419 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2020-10-28 15:20:55,720 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2020-10-28 15:20:56,197 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 49 [2020-10-28 15:20:57,010 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 62 [2020-10-28 15:20:57,834 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2020-10-28 15:20:59,509 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 297 DAG size of output: 84