/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=SHALLOWEST --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/eca-rers2012/Problem17_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:17:59,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:17:59,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:17:59,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:17:59,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:17:59,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:17:59,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:17:59,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:17:59,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:17:59,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:17:59,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:17:59,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:17:59,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:17:59,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:17:59,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:17:59,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:17:59,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:17:59,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:17:59,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:17:59,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:17:59,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:17:59,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:17:59,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:17:59,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:17:59,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:17:59,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:17:59,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:17:59,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:17:59,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:17:59,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:17:59,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:17:59,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:17:59,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:17:59,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:17:59,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:17:59,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:17:59,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:17:59,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:17:59,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:17:59,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:17:59,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:17:59,819 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 [2020-10-27 00:17:59,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:17:59,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:17:59,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:17:59,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:17:59,850 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:17:59,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:17:59,850 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:17:59,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:17:59,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:17:59,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:17:59,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:17:59,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:17:59,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:17:59,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:17:59,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:17:59,852 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:17:59,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:17:59,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:17:59,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:17:59,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:17:59,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:17:59,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:17:59,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:17:59,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:17:59,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:17:59,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:17:59,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:17:59,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:17:59,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:17:59,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:18:00,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:18:00,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:18:00,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:18:00,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:18:00,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:18:00,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label49.c [2020-10-27 00:18:00,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae164526e/494685545bab4e89bcf4079e2dbbeda1/FLAG0f8fbbdf6 [2020-10-27 00:18:01,316 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:18:01,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label49.c [2020-10-27 00:18:01,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae164526e/494685545bab4e89bcf4079e2dbbeda1/FLAG0f8fbbdf6 [2020-10-27 00:18:01,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae164526e/494685545bab4e89bcf4079e2dbbeda1 [2020-10-27 00:18:01,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:18:01,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:18:01,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:01,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:18:01,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:18:01,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:01" (1/1) ... [2020-10-27 00:18:01,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6ed5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:01, skipping insertion in model container [2020-10-27 00:18:01,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:01" (1/1) ... [2020-10-27 00:18:01,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:18:02,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:18:03,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:03,194 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:18:03,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:03,666 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:18:03,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03 WrapperNode [2020-10-27 00:18:03,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:03,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:18:03,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:18:03,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:18:03,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (1/1) ... [2020-10-27 00:18:03,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:18:03,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:18:03,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:18:03,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:18:03,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (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 [2020-10-27 00:18:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:18:04,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:18:04,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:18:04,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:18:04,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:18:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:18:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:18:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:18:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:18:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:18:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:18:13,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:18:13,575 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:18:13,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:18:13 BoogieIcfgContainer [2020-10-27 00:18:13,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:18:13,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:18:13,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:18:13,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:18:13,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:18:01" (1/3) ... [2020-10-27 00:18:13,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8dddd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:18:13, skipping insertion in model container [2020-10-27 00:18:13,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:03" (2/3) ... [2020-10-27 00:18:13,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8dddd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:18:13, skipping insertion in model container [2020-10-27 00:18:13,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:18:13" (3/3) ... [2020-10-27 00:18:13,590 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label49.c [2020-10-27 00:18:13,605 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:18:13,612 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:18:13,628 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:18:13,699 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:18:13,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:18:13,700 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:18:13,700 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:18:13,700 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:18:13,700 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:18:13,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:18:13,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:18:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:18:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 00:18:13,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:13,764 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] [2020-10-27 00:18:13,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1895603226, now seen corresponding path program 1 times [2020-10-27 00:18:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:13,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661274473] [2020-10-27 00:18:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:14,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:14,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 00:18:14,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:14,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-27 00:18:14,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 00:18:14,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:18:14,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:14,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:14,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:14,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:14,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:18:14,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:14,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:14,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661274473] [2020-10-27 00:18:14,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:14,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:18:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446829135] [2020-10-27 00:18:14,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:18:14,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:18:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:18:14,806 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:18:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:27,422 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:18:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:18:27,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 00:18:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:27,462 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:18:27,463 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:18:27,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:18:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:18:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:18:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:18:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:18:27,627 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 22 [2020-10-27 00:18:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:27,628 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:18:27,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:18:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:18:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 00:18:27,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:27,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:27,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:18:27,638 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1986008678, now seen corresponding path program 1 times [2020-10-27 00:18:27,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:27,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025388776] [2020-10-27 00:18:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:27,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:28,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:29,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:29,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 00:18:29,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-10-27 00:18:29,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:29,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:29,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:18:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:18:29,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:29,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:29,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:29,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:29,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 00:18:29,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:29,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:29,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:29,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:29,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:29,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:30,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:18:30,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:30,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 00:18:30,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:18:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:30,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025388776] [2020-10-27 00:18:30,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:30,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:18:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112321959] [2020-10-27 00:18:30,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:30,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:30,149 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:18:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:45,045 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:18:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:45,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-27 00:18:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:45,056 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:18:45,057 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:18:45,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:18:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:18:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:18:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:18:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:18:45,150 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 93 [2020-10-27 00:18:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:45,151 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:18:45,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:18:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 00:18:45,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:45,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:45,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:18:45,166 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash -174443929, now seen corresponding path program 1 times [2020-10-27 00:18:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:45,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411285775] [2020-10-27 00:18:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:18:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-27 00:18:45,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:18:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 00:18:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:46,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:46,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:46,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:46,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:18:46,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:46,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:46,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:46,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:18:46,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:46,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 00:18:46,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:46,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:46,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:46,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:18:46,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:46,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411285775] [2020-10-27 00:18:46,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:46,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:18:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738050981] [2020-10-27 00:18:46,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:18:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:46,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:18:46,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:18:46,511 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 8 states. [2020-10-27 00:19:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:05,282 INFO L93 Difference]: Finished difference Result 3449 states and 4777 transitions. [2020-10-27 00:19:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:19:05,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-27 00:19:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:05,298 INFO L225 Difference]: With dead ends: 3449 [2020-10-27 00:19:05,298 INFO L226 Difference]: Without dead ends: 1989 [2020-10-27 00:19:05,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:19:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2020-10-27 00:19:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1918. [2020-10-27 00:19:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 00:19:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2405 transitions. [2020-10-27 00:19:05,383 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2405 transitions. Word has length 96 [2020-10-27 00:19:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2405 transitions. [2020-10-27 00:19:05,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:19:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2405 transitions. [2020-10-27 00:19:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 00:19:05,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:05,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:05,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:19:05,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1920696546, now seen corresponding path program 1 times [2020-10-27 00:19:05,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:05,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747850380] [2020-10-27 00:19:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:05,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:07,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:07,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-27 00:19:07,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1616 [2020-10-27 00:19:07,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:19:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:07,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:07,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:07,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:07,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:07,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:07,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:07,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:07,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:19:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:19:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:19:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747850380] [2020-10-27 00:19:07,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:07,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:07,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451565144] [2020-10-27 00:19:07,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:07,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:07,816 INFO L87 Difference]: Start difference. First operand 1918 states and 2405 transitions. Second operand 7 states. [2020-10-27 00:19:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:27,538 INFO L93 Difference]: Finished difference Result 4348 states and 5797 transitions. [2020-10-27 00:19:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:19:27,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2020-10-27 00:19:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:27,557 INFO L225 Difference]: With dead ends: 4348 [2020-10-27 00:19:27,557 INFO L226 Difference]: Without dead ends: 2872 [2020-10-27 00:19:27,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2020-10-27 00:19:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2842. [2020-10-27 00:19:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2020-10-27 00:19:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3570 transitions. [2020-10-27 00:19:27,652 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3570 transitions. Word has length 178 [2020-10-27 00:19:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:27,653 INFO L481 AbstractCegarLoop]: Abstraction has 2842 states and 3570 transitions. [2020-10-27 00:19:27,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3570 transitions. [2020-10-27 00:19:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 00:19:27,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:27,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:27,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:19:27,657 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1446267304, now seen corresponding path program 1 times [2020-10-27 00:19:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:27,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210704746] [2020-10-27 00:19:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:27,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:29,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 00:19:29,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:19:29,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:29,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:29,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:29,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:19:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:29,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:29,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:29,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:29,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:29,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:29,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:19:29,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:19:30,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210704746] [2020-10-27 00:19:30,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:30,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:19:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297889299] [2020-10-27 00:19:30,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:19:30,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:19:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:19:30,273 INFO L87 Difference]: Start difference. First operand 2842 states and 3570 transitions. Second operand 6 states. [2020-10-27 00:19:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:47,127 INFO L93 Difference]: Finished difference Result 5695 states and 7538 transitions. [2020-10-27 00:19:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:19:47,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 195 [2020-10-27 00:19:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:47,148 INFO L225 Difference]: With dead ends: 5695 [2020-10-27 00:19:47,149 INFO L226 Difference]: Without dead ends: 3297 [2020-10-27 00:19:47,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2020-10-27 00:19:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 3277. [2020-10-27 00:19:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3277 states. [2020-10-27 00:19:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 4205 transitions. [2020-10-27 00:19:47,264 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 4205 transitions. Word has length 195 [2020-10-27 00:19:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:47,265 INFO L481 AbstractCegarLoop]: Abstraction has 3277 states and 4205 transitions. [2020-10-27 00:19:47,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:19:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 4205 transitions. [2020-10-27 00:19:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-27 00:19:47,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:47,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:47,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:19:47,271 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1573654452, now seen corresponding path program 1 times [2020-10-27 00:19:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:47,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331660909] [2020-10-27 00:19:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:50,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:52,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:52,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 00:19:52,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4742 [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-27 00:19:52,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:52,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:52,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:52,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:52,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:52,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:19:52,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:52,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:52,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:52,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:52,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 00:19:52,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:19:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:19:52,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:52,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:52,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:52,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:19:52,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 00:19:52,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:19:52,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:52,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:19:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:53,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:53,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:53,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:53,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:53,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 00:19:53,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 00:19:53,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331660909] [2020-10-27 00:19:53,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:53,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:19:53,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864492843] [2020-10-27 00:19:53,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:19:53,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:19:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:19:53,416 INFO L87 Difference]: Start difference. First operand 3277 states and 4205 transitions. Second operand 9 states. [2020-10-27 00:19:53,576 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:18,229 INFO L93 Difference]: Finished difference Result 8963 states and 12238 transitions. [2020-10-27 00:20:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 00:20:18,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 266 [2020-10-27 00:20:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:18,275 INFO L225 Difference]: With dead ends: 8963 [2020-10-27 00:20:18,275 INFO L226 Difference]: Without dead ends: 5679 [2020-10-27 00:20:18,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:20:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2020-10-27 00:20:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 4169. [2020-10-27 00:20:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4169 states. [2020-10-27 00:20:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5226 transitions. [2020-10-27 00:20:18,524 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5226 transitions. Word has length 266 [2020-10-27 00:20:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:18,525 INFO L481 AbstractCegarLoop]: Abstraction has 4169 states and 5226 transitions. [2020-10-27 00:20:18,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:20:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5226 transitions. [2020-10-27 00:20:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-27 00:20:18,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:18,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:18,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:20:18,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 119163379, now seen corresponding path program 1 times [2020-10-27 00:20:18,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:18,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786412354] [2020-10-27 00:20:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:23,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:23,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-27 00:20:23,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:20:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 00:20:23,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 00:20:23,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:23,850 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:20:23,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:23,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:23,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 00:20:23,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:23,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:23,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:24,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 00:20:24,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:24,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:24,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:24,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 00:20:24,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:24,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 00:20:24,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 00:20:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-27 00:20:24,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-27 00:20:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:24,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:24,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:20:24,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:24,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 00:20:24,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:20:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:20:24,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786412354] [2020-10-27 00:20:24,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:24,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:24,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305912327] [2020-10-27 00:20:24,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:20:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:20:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:24,730 INFO L87 Difference]: Start difference. First operand 4169 states and 5226 transitions. Second operand 7 states. [2020-10-27 00:20:35,726 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:52,207 INFO L93 Difference]: Finished difference Result 11255 states and 14502 transitions. [2020-10-27 00:20:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:20:52,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 282 [2020-10-27 00:20:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:52,255 INFO L225 Difference]: With dead ends: 11255 [2020-10-27 00:20:52,255 INFO L226 Difference]: Without dead ends: 7532 [2020-10-27 00:20:52,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7532 states. [2020-10-27 00:20:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7532 to 7398. [2020-10-27 00:20:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7398 states. [2020-10-27 00:20:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7398 states to 7398 states and 8926 transitions. [2020-10-27 00:20:52,547 INFO L78 Accepts]: Start accepts. Automaton has 7398 states and 8926 transitions. Word has length 282 [2020-10-27 00:20:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:52,548 INFO L481 AbstractCegarLoop]: Abstraction has 7398 states and 8926 transitions. [2020-10-27 00:20:52,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7398 states and 8926 transitions. [2020-10-27 00:20:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-27 00:20:52,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:52,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:52,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:20:52,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2056856339, now seen corresponding path program 1 times [2020-10-27 00:20:52,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:52,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024141032] [2020-10-27 00:20:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:52,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:57,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:57,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:57,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:20:57,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:57,891 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:20:57,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:57,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:57,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:57,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:57,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:20:57,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:57,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:57,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:57,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:57,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:57,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:58,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:58,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:58,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:58,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:20:58,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:58,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:58,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:58,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:20:58,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:58,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:58,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:20:58,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:58,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 00:20:58,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:20:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:58,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:20:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:58,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:58,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:20:58,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:58,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 00:20:58,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:58,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:20:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:20:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024141032] [2020-10-27 00:20:59,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:59,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682230104] [2020-10-27 00:20:59,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:20:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:20:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:59,232 INFO L87 Difference]: Start difference. First operand 7398 states and 8926 transitions. Second operand 7 states. [2020-10-27 00:21:00,408 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:21:07,826 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:21:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:26,240 INFO L93 Difference]: Finished difference Result 16236 states and 19549 transitions. [2020-10-27 00:21:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:21:26,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 289 [2020-10-27 00:21:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:26,299 INFO L225 Difference]: With dead ends: 16236 [2020-10-27 00:21:26,299 INFO L226 Difference]: Without dead ends: 9284 [2020-10-27 00:21:26,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:21:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2020-10-27 00:21:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 8727. [2020-10-27 00:21:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8727 states. [2020-10-27 00:21:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8727 states to 8727 states and 10419 transitions. [2020-10-27 00:21:26,613 INFO L78 Accepts]: Start accepts. Automaton has 8727 states and 10419 transitions. Word has length 289 [2020-10-27 00:21:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:26,614 INFO L481 AbstractCegarLoop]: Abstraction has 8727 states and 10419 transitions. [2020-10-27 00:21:26,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 8727 states and 10419 transitions. [2020-10-27 00:21:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-27 00:21:26,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:26,622 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:26,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:21:26,622 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 958888205, now seen corresponding path program 1 times [2020-10-27 00:21:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:26,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329297105] [2020-10-27 00:21:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:26,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:31,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:31,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:21:31,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:31,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:21:31,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:31,988 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:21:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:32,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:32,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:32,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:21:32,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:32,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:32,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:32,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:32,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:32,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:32,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:21:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:33,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-27 00:21:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:33,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:33,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:21:33,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:33,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 00:21:33,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:21:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:33,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 47 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:21:33,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329297105] [2020-10-27 00:21:33,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:33,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:21:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391436738] [2020-10-27 00:21:33,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:21:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:21:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:21:33,376 INFO L87 Difference]: Start difference. First operand 8727 states and 10419 transitions. Second operand 10 states. [2020-10-27 00:21:33,720 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 00:21:34,776 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:21:41,996 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 70