/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/array-fpi/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:15:43,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:15:43,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:15:43,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:15:43,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:15:43,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:15:43,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:15:43,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:15:43,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:15:43,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:15:43,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:15:43,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:15:43,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:15:43,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:15:43,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:15:43,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:15:43,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:15:43,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:15:43,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:15:43,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:15:43,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:15:43,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:15:43,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:15:43,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:15:43,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:15:43,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:15:43,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:15:43,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:15:43,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:15:43,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:15:43,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:15:43,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:15:43,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:15:43,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:15:43,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:15:43,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:15:43,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:15:43,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:15:43,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:15:43,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:15:43,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:15:43,882 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 09:15:43,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:15:43,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:15:43,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:15:43,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:15:43,941 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:15:43,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:15:43,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:15:43,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:15:43,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:15:43,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:15:43,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:15:43,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:15:43,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:15:43,945 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:15:43,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:15:43,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:15:43,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:15:43,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:15:43,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:15:43,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:15:43,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:15:43,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:15:43,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:15:43,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:15:43,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:15:43,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:15:43,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:15:43,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:15:43,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:15:43,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:15:44,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:15:44,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:15:44,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:15:44,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:15:44,407 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:15:44,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2.c [2020-10-28 09:15:44,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d68694fd0/965b71b1f686441aa3139c58048a1fdb/FLAGd1167cfed [2020-10-28 09:15:45,059 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:15:45,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2.c [2020-10-28 09:15:45,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d68694fd0/965b71b1f686441aa3139c58048a1fdb/FLAGd1167cfed [2020-10-28 09:15:45,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d68694fd0/965b71b1f686441aa3139c58048a1fdb [2020-10-28 09:15:45,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:15:45,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:15:45,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:45,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:15:45,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:15:45,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bad8031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45, skipping insertion in model container [2020-10-28 09:15:45,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:15:45,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:15:45,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:45,758 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:15:45,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:45,809 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:15:45,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45 WrapperNode [2020-10-28 09:15:45,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:45,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:15:45,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:15:45,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:15:45,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (1/1) ... [2020-10-28 09:15:45,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:15:45,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:15:45,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:15:45,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:15:45,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (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 09:15:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:15:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:15:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:15:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:15:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:15:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:15:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:15:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:15:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:15:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:15:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:15:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:15:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:15:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:15:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:15:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:15:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:15:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:15:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:15:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:15:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:15:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:15:46,743 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:15:46,743 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 09:15:46,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:46 BoogieIcfgContainer [2020-10-28 09:15:46,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:15:46,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:15:46,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:15:46,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:15:46,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:15:45" (1/3) ... [2020-10-28 09:15:46,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:46, skipping insertion in model container [2020-10-28 09:15:46,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:45" (2/3) ... [2020-10-28 09:15:46,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:46, skipping insertion in model container [2020-10-28 09:15:46,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:46" (3/3) ... [2020-10-28 09:15:46,758 INFO L111 eAbstractionObserver]: Analyzing ICFG res2.c [2020-10-28 09:15:46,770 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:15:46,776 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:15:46,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:15:46,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:15:46,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:15:46,834 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:15:46,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:15:46,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:15:46,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:15:46,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:15:46,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:15:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-28 09:15:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:15:46,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:46,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:46,870 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:46,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1686177906, now seen corresponding path program 1 times [2020-10-28 09:15:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:46,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164619591] [2020-10-28 09:15:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:50,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:15:50,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:15:50,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3898 [2020-10-28 09:15:50,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:50,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:15:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:50,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:15:51,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:51,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:51,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:15:51,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:51,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:51,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:51,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:51,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:51,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:51,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:51,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:15:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:51,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:51,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:51,090 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 09:15:51,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164619591] [2020-10-28 09:15:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:51,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:15:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054009466] [2020-10-28 09:15:51,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:15:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:15:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:51,118 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-28 09:15:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:51,272 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-10-28 09:15:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:15:51,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-28 09:15:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:51,284 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:15:51,284 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 09:15:51,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:15:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 09:15:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 09:15:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:15:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-28 09:15:51,348 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-28 09:15:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:51,348 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-28 09:15:51,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:15:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-28 09:15:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:15:51,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:51,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:51,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:15:51,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -961350168, now seen corresponding path program 1 times [2020-10-28 09:15:51,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230123444] [2020-10-28 09:15:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:15:56,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:15:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:15:56,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:56,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:15:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:15:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:15:56,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:56,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:56,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:56,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:56,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:56,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:56,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:15:56,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:56,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:56,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:56,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:56,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:56,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:56,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:56,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:56,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:56,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:56,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:56,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:15:56,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:56,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:15:56,572 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 09:15:56,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230123444] [2020-10-28 09:15:56,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:56,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:15:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155708834] [2020-10-28 09:15:56,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:15:56,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:56,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:15:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:15:56,582 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2020-10-28 09:15:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:56,877 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-28 09:15:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:15:56,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-28 09:15:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:56,879 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:15:56,879 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:15:56,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:15:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:15:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 09:15:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 09:15:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 09:15:56,892 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2020-10-28 09:15:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:56,893 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 09:15:56,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:15:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 09:15:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:15:56,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:56,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:56,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:15:56,895 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1706440668, now seen corresponding path program 1 times [2020-10-28 09:15:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:56,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177928930] [2020-10-28 09:15:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:00,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:01,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:01,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:16:01,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:16:01,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:16:01,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:01,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:16:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:16:01,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:02,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:02,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:02,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:02,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:02,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:16:02,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:02,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:02,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:02,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:02,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:02,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:02,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:02,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:02,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:02,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:02,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:02,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177928930] [2020-10-28 09:16:02,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:02,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:16:02,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788350229] [2020-10-28 09:16:02,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:16:02,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:16:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:16:02,761 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 18 states. [2020-10-28 09:16:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:04,039 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-28 09:16:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:16:04,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-28 09:16:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:04,041 INFO L225 Difference]: With dead ends: 71 [2020-10-28 09:16:04,041 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:16:04,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:16:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:16:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-28 09:16:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:16:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-28 09:16:04,054 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 42 [2020-10-28 09:16:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:04,055 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-28 09:16:04,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:16:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-28 09:16:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:16:04,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:04,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:04,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:16:04,057 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash 406539258, now seen corresponding path program 2 times [2020-10-28 09:16:04,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:04,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920795541] [2020-10-28 09:16:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:16:09,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:09,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:16:09,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:16:09,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:09,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:09,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:09,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:09,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:09,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:16:09,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920795541] [2020-10-28 09:16:09,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:09,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:09,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117587802] [2020-10-28 09:16:09,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:09,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:09,208 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 8 states. [2020-10-28 09:16:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:09,621 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2020-10-28 09:16:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:09,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-28 09:16:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:09,623 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:16:09,623 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:16:09,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:16:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:16:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2020-10-28 09:16:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:16:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-28 09:16:09,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2020-10-28 09:16:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:09,652 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-28 09:16:09,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-28 09:16:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:16:09,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:09,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:09,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:16:09,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1203019048, now seen corresponding path program 3 times [2020-10-28 09:16:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:09,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683900356] [2020-10-28 09:16:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:16:14,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:16:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:16:14,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:16:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:14,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:14,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:14,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:16:14,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:14,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:14,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:14,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:14,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:14,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:14,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:14,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:14,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:14,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:14,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:14,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:16:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683900356] [2020-10-28 09:16:14,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:14,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:14,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537397775] [2020-10-28 09:16:14,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:14,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:14,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:14,838 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 8 states. [2020-10-28 09:16:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:15,342 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-28 09:16:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:15,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-28 09:16:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:15,344 INFO L225 Difference]: With dead ends: 74 [2020-10-28 09:16:15,344 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:16:15,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:16:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:16:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 09:16:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:16:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-28 09:16:15,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 46 [2020-10-28 09:16:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:15,367 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-28 09:16:15,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-28 09:16:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:16:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:15,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:15,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:16:15,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1102906416, now seen corresponding path program 4 times [2020-10-28 09:16:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473468383] [2020-10-28 09:16:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:15,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:20,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:16:20,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:16:20,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:16:20,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:20,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:20,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:16:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:16:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:16:22,046 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-28 09:16:23,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:23,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:23,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:23,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:23,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:23,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:23,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:23,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:23,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:23,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:23,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:23,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:23,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473468383] [2020-10-28 09:16:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:16:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289746511] [2020-10-28 09:16:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:16:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:16:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:16:23,457 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 33 states. [2020-10-28 09:16:24,016 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-28 09:16:24,413 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-28 09:16:24,987 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-28 09:16:25,431 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 09:16:25,719 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 09:16:26,691 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 09:16:26,950 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-28 09:16:27,195 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-28 09:16:27,496 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-28 09:16:28,013 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 09:16:28,746 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 09:16:28,948 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-28 09:16:29,160 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 09:16:29,830 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-28 09:16:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:30,648 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-28 09:16:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 09:16:30,649 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 54 [2020-10-28 09:16:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:30,652 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:16:30,652 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:16:30,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=644, Invalid=5056, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 09:16:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:16:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-28 09:16:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:16:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-28 09:16:30,669 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 54 [2020-10-28 09:16:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:30,669 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-28 09:16:30,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:16:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-28 09:16:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:16:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:30,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:30,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:16:30,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1779913582, now seen corresponding path program 5 times [2020-10-28 09:16:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:30,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961605424] [2020-10-28 09:16:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:30,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:16:35,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:35,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:16:35,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:16:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:35,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:35,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:35,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:35,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:35,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:35,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:16:35,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961605424] [2020-10-28 09:16:35,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:35,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:35,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393496276] [2020-10-28 09:16:35,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:35,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:35,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:35,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:35,823 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 10 states. [2020-10-28 09:16:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:36,369 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-28 09:16:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:16:36,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-28 09:16:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:36,377 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:16:36,377 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:16:36,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:16:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:16:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-28 09:16:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:16:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-28 09:16:36,393 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 56 [2020-10-28 09:16:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:36,393 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-28 09:16:36,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-28 09:16:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:16:36,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:36,395 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:36,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:16:36,395 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash 958430412, now seen corresponding path program 6 times [2020-10-28 09:16:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:36,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093802201] [2020-10-28 09:16:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:36,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:36,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:41,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:41,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:16:41,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:16:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:16:41,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:41,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:16:41,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:41,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:41,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:41,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:41,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:41,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:41,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:41,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:16:41,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:41,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:41,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 09:16:41,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093802201] [2020-10-28 09:16:41,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:41,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:41,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300804047] [2020-10-28 09:16:41,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:41,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:41,586 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 10 states. [2020-10-28 09:16:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:42,051 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-28 09:16:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:16:42,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-28 09:16:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:42,052 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:16:42,053 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:16:42,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:16:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 09:16:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:16:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-28 09:16:42,065 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 58 [2020-10-28 09:16:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:42,065 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-28 09:16:42,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-28 09:16:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:16:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:42,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:42,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:16:42,067 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1203093052, now seen corresponding path program 7 times [2020-10-28 09:16:42,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:42,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559744484] [2020-10-28 09:16:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:47,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:16:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:47,569 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 09:16:47,923 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 09:16:48,208 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-28 09:16:49,352 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-28 09:16:49,520 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-28 09:16:50,003 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 09:16:52,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:52,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:52,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:52,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:52,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:52,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:52,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:52,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:52,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:52,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559744484] [2020-10-28 09:16:52,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:52,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 09:16:52,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713036219] [2020-10-28 09:16:52,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 09:16:52,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 09:16:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1875, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:16:52,250 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 46 states. [2020-10-28 09:16:53,082 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-28 09:16:53,398 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-28 09:16:53,784 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-28 09:16:54,000 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-28 09:16:54,428 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-28 09:16:54,617 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 09:16:54,863 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-28 09:16:55,285 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-28 09:16:55,629 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-28 09:16:55,955 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-28 09:16:56,188 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-28 09:16:56,448 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2020-10-28 09:16:56,731 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2020-10-28 09:16:57,014 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-28 09:16:57,293 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-10-28 09:16:57,775 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-28 09:16:58,265 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-28 09:16:58,611 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-28 09:16:58,874 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-28 09:16:59,120 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-28 09:16:59,862 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-28 09:17:00,116 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-28 09:17:00,406 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 09:17:00,658 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 09:17:01,037 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-28 09:17:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:03,277 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-10-28 09:17:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 09:17:03,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-28 09:17:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:03,280 INFO L225 Difference]: With dead ends: 117 [2020-10-28 09:17:03,280 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 09:17:03,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=760, Invalid=7430, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 09:17:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 09:17:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-10-28 09:17:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:17:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-28 09:17:03,311 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 66 [2020-10-28 09:17:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:03,311 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-28 09:17:03,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 09:17:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-28 09:17:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:17:03,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:03,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:03,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:17:03,321 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 368344034, now seen corresponding path program 8 times [2020-10-28 09:17:03,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:03,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617421314] [2020-10-28 09:17:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:03,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:03,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:08,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:08,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:08,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:08,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:17:08,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:08,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:08,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:08,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:08,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:17:08,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:08,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:08,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:08,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:08,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:08,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:08,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:17:08,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617421314] [2020-10-28 09:17:08,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:08,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:08,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952925720] [2020-10-28 09:17:08,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:08,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:08,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:08,569 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 12 states. [2020-10-28 09:17:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:09,245 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2020-10-28 09:17:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:17:09,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-28 09:17:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:09,247 INFO L225 Difference]: With dead ends: 218 [2020-10-28 09:17:09,247 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:17:09,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:17:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-10-28 09:17:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:17:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-28 09:17:09,273 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 68 [2020-10-28 09:17:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:09,274 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-28 09:17:09,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-28 09:17:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:17:09,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:09,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:09,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:17:09,278 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash 540219584, now seen corresponding path program 9 times [2020-10-28 09:17:09,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:09,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237978481] [2020-10-28 09:17:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:17:14,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:14,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:14,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:17:14,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:14,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:14,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:14,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:14,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 09:17:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237978481] [2020-10-28 09:17:14,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:14,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:14,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815519052] [2020-10-28 09:17:14,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:14,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:14,520 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 12 states. [2020-10-28 09:17:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:15,415 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-28 09:17:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:17:15,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-28 09:17:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:15,417 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:17:15,417 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:17:15,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:17:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:17:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 09:17:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:17:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-28 09:17:15,428 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 70 [2020-10-28 09:17:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-28 09:17:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-28 09:17:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:17:15,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:15,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 09:17:15,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:17:15,430 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2000488888, now seen corresponding path program 10 times [2020-10-28 09:17:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654738924] [2020-10-28 09:17:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:17,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:19,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:21,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6074 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:17:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:22,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-28 09:17:22,417 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-28 09:17:22,537 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-28 09:17:22,665 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 09:17:22,790 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 09:17:22,959 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 09:17:23,140 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-28 09:17:23,296 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-28 09:17:23,472 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 09:17:23,677 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 09:17:24,650 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-28 09:17:24,843 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-28 09:17:25,041 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-28 09:17:25,265 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-28 09:17:25,469 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-28 09:17:25,686 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-28 09:17:25,902 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-28 09:17:26,171 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-28 09:17:26,392 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-28 09:17:26,635 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-28 09:17:26,877 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-28 09:17:27,140 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-28 09:17:27,351 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-28 09:17:27,556 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-28 09:17:28,870 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-28 09:17:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:30,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:30,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:30,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:30,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:30,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654738924] [2020-10-28 09:17:30,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:30,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 09:17:30,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912215989] [2020-10-28 09:17:30,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 09:17:30,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 09:17:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3028, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 09:17:30,726 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 58 states. [2020-10-28 09:17:32,470 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 84 [2020-10-28 09:17:32,949 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 83 [2020-10-28 09:17:33,425 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2020-10-28 09:17:34,179 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-28 09:17:34,784 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-28 09:17:35,410 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 115 [2020-10-28 09:17:36,039 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 105 [2020-10-28 09:17:36,408 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-28 09:17:36,910 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2020-10-28 09:17:37,194 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-28 09:17:37,556 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-10-28 09:17:37,915 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-28 09:17:38,240 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-28 09:17:38,507 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 09:17:38,867 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-28 09:17:39,194 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-28 09:17:39,537 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 09:17:40,007 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-28 09:17:40,486 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2020-10-28 09:17:40,984 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-28 09:17:41,374 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-28 09:17:41,889 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-10-28 09:17:42,302 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-28 09:17:42,775 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-28 09:17:43,060 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-28 09:17:43,641 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2020-10-28 09:17:43,992 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-28 09:17:44,482 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-28 09:17:45,233 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2020-10-28 09:17:45,758 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2020-10-28 09:17:46,269 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-28 09:17:46,794 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-28 09:17:47,276 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-28 09:17:47,736 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 70 [2020-10-28 09:17:48,263 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-28 09:17:48,760 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-10-28 09:17:49,287 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 78 [2020-10-28 09:17:49,803 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-28 09:17:50,345 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 66 [2020-10-28 09:17:50,882 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2020-10-28 09:17:51,430 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 75 [2020-10-28 09:17:51,935 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-28 09:17:52,546 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-28 09:17:52,988 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-10-28 09:17:53,386 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-28 09:17:53,759 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-28 09:17:54,168 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 67 [2020-10-28 09:17:54,597 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-28 09:17:55,314 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2020-10-28 09:17:56,070 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-28 09:17:56,641 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-28 09:17:57,183 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-28 09:17:57,868 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-28 09:17:58,193 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-28 09:17:58,851 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-28 09:17:59,501 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 71 [2020-10-28 09:18:00,047 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2020-10-28 09:18:00,819 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 84 [2020-10-28 09:18:01,408 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 67 [2020-10-28 09:18:01,750 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 47 [2020-10-28 09:18:02,176 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2020-10-28 09:18:02,505 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 57 [2020-10-28 09:18:03,125 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-28 09:18:03,538 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 57 [2020-10-28 09:18:03,806 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 09:18:04,438 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 102 [2020-10-28 09:18:04,901 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-28 09:18:05,979 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 09:18:06,394 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-28 09:18:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:07,044 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2020-10-28 09:18:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-28 09:18:07,045 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 78 [2020-10-28 09:18:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:07,047 INFO L225 Difference]: With dead ends: 181 [2020-10-28 09:18:07,047 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:18:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5428 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=2009, Invalid=18013, Unknown=0, NotChecked=0, Total=20022 [2020-10-28 09:18:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:18:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2020-10-28 09:18:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:18:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-28 09:18:07,077 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 78 [2020-10-28 09:18:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:07,077 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-28 09:18:07,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 09:18:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-28 09:18:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:18:07,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:07,078 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 09:18:07,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:18:07,079 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:07,079 INFO L82 PathProgramCache]: Analyzing trace with hash -480962858, now seen corresponding path program 11 times [2020-10-28 09:18:07,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:07,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946920156] [2020-10-28 09:18:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:18:12,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:12,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:12,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:12,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:12,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:12,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:12,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:12,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:12,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:12,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:12,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:12,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:12,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:12,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:12,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 09:18:12,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946920156] [2020-10-28 09:18:12,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:12,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126220686] [2020-10-28 09:18:12,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:12,393 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 14 states. [2020-10-28 09:18:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:13,470 INFO L93 Difference]: Finished difference Result 268 states and 293 transitions. [2020-10-28 09:18:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:18:13,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-28 09:18:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:13,474 INFO L225 Difference]: With dead ends: 268 [2020-10-28 09:18:13,474 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:18:13,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:18:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:18:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2020-10-28 09:18:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 09:18:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-10-28 09:18:13,494 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 80 [2020-10-28 09:18:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:13,495 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-10-28 09:18:13,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-10-28 09:18:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:18:13,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:13,496 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 09:18:13,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:18:13,496 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash -879532010, now seen corresponding path program 12 times [2020-10-28 09:18:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:13,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217968390] [2020-10-28 09:18:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:13,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:18:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:18,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:18,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:18:18,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:18,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:18,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:18,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:18,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:18,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 09:18:18,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217968390] [2020-10-28 09:18:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034426761] [2020-10-28 09:18:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:18,813 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 14 states. [2020-10-28 09:18:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:20,037 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-28 09:18:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:18:20,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-28 09:18:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:20,040 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:18:20,040 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:18:20,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:18:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:18:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 09:18:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:18:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-28 09:18:20,055 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 80 [2020-10-28 09:18:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:20,055 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-28 09:18:20,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-28 09:18:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:18:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:20,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 09:18:20,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:18:20,056 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1510757292, now seen corresponding path program 13 times [2020-10-28 09:18:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:20,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480221848] [2020-10-28 09:18:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:25,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 09:18:25,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:25,874 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-28 09:18:26,008 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-28 09:18:26,186 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 09:18:26,430 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 09:18:26,612 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 09:18:26,819 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-28 09:18:27,055 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 09:18:27,346 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-28 09:18:27,547 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-28 09:18:27,743 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-28 09:18:27,984 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-28 09:18:28,202 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-28 09:18:28,482 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-28 09:18:28,722 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-28 09:18:29,013 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-28 09:18:29,250 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-28 09:18:29,509 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-28 09:18:29,780 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2020-10-28 09:18:30,013 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-10-28 09:18:30,493 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2020-10-28 09:18:30,796 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 43 [2020-10-28 09:18:31,243 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2020-10-28 09:18:31,576 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2020-10-28 09:18:31,896 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-28 09:18:32,207 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-10-28 09:18:32,612 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-10-28 09:18:32,995 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 56 [2020-10-28 09:18:33,363 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-28 09:18:33,721 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-28 09:18:34,085 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-28 09:18:34,391 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-28 09:18:34,792 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 65 [2020-10-28 09:18:35,141 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-28 09:18:35,534 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-28 09:18:35,873 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-28 09:18:36,225 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-28 09:18:36,494 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 09:18:36,848 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-28 09:18:37,185 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-28 09:18:37,503 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-28 09:18:41,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:41,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:41,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:41,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:41,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:41,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:41,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:41,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:41,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:41,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:41,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:41,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:41,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480221848] [2020-10-28 09:18:41,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:41,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-28 09:18:41,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467975433] [2020-10-28 09:18:41,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-28 09:18:41,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-28 09:18:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4461, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 09:18:41,220 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 70 states. [2020-10-28 09:18:41,937 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-10-28 09:18:42,230 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-28 09:18:42,623 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-28 09:18:43,779 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 114 [2020-10-28 09:18:45,074 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 112 [2020-10-28 09:18:46,327 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 117 [2020-10-28 09:18:47,510 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 111 [2020-10-28 09:18:48,475 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2020-10-28 09:18:49,253 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 78 [2020-10-28 09:18:50,124 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2020-10-28 09:18:51,322 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 80 [2020-10-28 09:18:51,966 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-28 09:18:52,476 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-28 09:18:53,294 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-28 09:18:54,016 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 79 [2020-10-28 09:18:55,586 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 189 DAG size of output: 122 [2020-10-28 09:18:56,498 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 118 [2020-10-28 09:18:58,034 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 163 DAG size of output: 138 [2020-10-28 09:18:58,684 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 95 [2020-10-28 09:18:59,346 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2020-10-28 09:18:59,741 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-28 09:18:59,988 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-28 09:19:00,237 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-28 09:19:00,593 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 09:19:00,934 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 09:19:01,512 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 09:19:01,907 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 09:19:02,293 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-28 09:19:02,668 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 09:19:03,036 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 09:19:03,412 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 09:19:03,768 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-28 09:19:04,154 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-28 09:19:04,526 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 09:19:04,903 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 09:19:05,561 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-28 09:19:05,803 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-28 09:19:06,174 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-28 09:19:06,915 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-28 09:19:07,539 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-10-28 09:19:08,033 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-28 09:19:08,319 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-28 09:19:08,700 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 09:19:09,037 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 09:19:09,531 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-28 09:19:09,893 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 09:19:10,453 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-28 09:19:11,090 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-28 09:19:12,620 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-28 09:19:13,291 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-28 09:19:13,986 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-28 09:19:14,815 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2020-10-28 09:19:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:17,161 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-28 09:19:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-28 09:19:17,163 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 90 [2020-10-28 09:19:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:17,165 INFO L225 Difference]: With dead ends: 161 [2020-10-28 09:19:17,165 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 09:19:17,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5791 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=1627, Invalid=17833, Unknown=0, NotChecked=0, Total=19460 [2020-10-28 09:19:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 09:19:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 132. [2020-10-28 09:19:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:19:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2020-10-28 09:19:17,190 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 90 [2020-10-28 09:19:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:17,190 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2020-10-28 09:19:17,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-28 09:19:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2020-10-28 09:19:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 09:19:17,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:17,191 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 09:19:17,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:19:17,192 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1333375946, now seen corresponding path program 14 times [2020-10-28 09:19:17,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:17,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727583204] [2020-10-28 09:19:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:17,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:22,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 09:19:22,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:19:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:19:22,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:22,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:22,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:22,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:22,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:22,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:22,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:22,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:22,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 09:19:22,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727583204] [2020-10-28 09:19:22,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:22,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:19:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188398334] [2020-10-28 09:19:22,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:19:22,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:19:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:19:22,603 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand 16 states. [2020-10-28 09:19:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:23,839 INFO L93 Difference]: Finished difference Result 286 states and 309 transitions. [2020-10-28 09:19:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:19:23,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-10-28 09:19:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:23,843 INFO L225 Difference]: With dead ends: 286 [2020-10-28 09:19:23,843 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 09:19:23,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:19:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 09:19:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2020-10-28 09:19:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:19:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-28 09:19:23,865 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 92 [2020-10-28 09:19:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:23,865 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-28 09:19:23,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:19:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-28 09:19:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 09:19:23,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:23,867 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 09:19:23,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:19:23,867 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1806379352, now seen corresponding path program 15 times [2020-10-28 09:19:23,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:23,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158815589] [2020-10-28 09:19:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:28,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:19:28,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:19:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:19:28,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0