/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=DEEPEST --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/Problem13_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:57:41,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:57:41,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:57:41,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:57:41,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:57:41,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:57:41,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:57:41,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:57:41,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:57:41,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:57:41,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:57:41,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:57:41,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:57:41,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:57:41,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:57:41,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:57:41,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:57:41,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:57:41,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:57:41,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:57:41,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:57:41,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:57:41,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:57:41,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:57:41,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:57:41,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:57:41,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:57:41,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:57:41,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:57:41,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:57:41,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:57:41,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:57:41,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:57:41,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:57:41,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:57:41,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:57:41,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:57:41,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:57:41,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:57:41,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:57:41,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:57:41,858 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 17:57:41,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:57:41,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:57:41,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:57:41,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:57:41,912 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:57:41,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:57:41,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:57:41,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:57:41,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:57:41,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:57:41,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:57:41,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:57:41,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:57:41,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:57:41,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:57:41,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:57:41,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:57:41,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:57:41,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:57:41,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:57:41,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:57:41,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:57:41,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:57:41,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:57:41,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:57:42,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:57:42,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:57:42,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:57:42,327 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:57:42,328 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:57:42,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label17.c [2020-10-27 17:57:42,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e672a872a/b4a015a823e14de08907263b7c1d406c/FLAG4e5e5a8dd [2020-10-27 17:57:43,505 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:57:43,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label17.c [2020-10-27 17:57:43,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e672a872a/b4a015a823e14de08907263b7c1d406c/FLAG4e5e5a8dd [2020-10-27 17:57:43,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e672a872a/b4a015a823e14de08907263b7c1d406c [2020-10-27 17:57:43,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:57:43,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:57:43,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:57:43,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:57:43,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:57:43,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:57:43" (1/1) ... [2020-10-27 17:57:43,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb6a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:43, skipping insertion in model container [2020-10-27 17:57:43,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:57:43" (1/1) ... [2020-10-27 17:57:43,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:57:44,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:57:45,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:57:45,551 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:57:46,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:57:46,279 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:57:46,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46 WrapperNode [2020-10-27 17:57:46,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:57:46,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:57:46,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:57:46,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:57:46,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (1/1) ... [2020-10-27 17:57:46,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:57:46,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:57:46,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:57:46,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:57:46,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (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 17:57:46,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:57:46,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:57:46,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:57:46,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:57:46,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:57:46,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:57:46,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:57:46,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:57:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:57:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:57:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:57:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:57:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:57:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:57:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:57:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:57:46,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:57:46,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:57:46,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:57:58,565 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:57:58,565 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:57:58,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:57:58 BoogieIcfgContainer [2020-10-27 17:57:58,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:57:58,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:57:58,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:57:58,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:57:58,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:57:43" (1/3) ... [2020-10-27 17:57:58,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89a5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:57:58, skipping insertion in model container [2020-10-27 17:57:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:46" (2/3) ... [2020-10-27 17:57:58,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89a5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:57:58, skipping insertion in model container [2020-10-27 17:57:58,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:57:58" (3/3) ... [2020-10-27 17:57:58,578 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label17.c [2020-10-27 17:57:58,590 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:57:58,596 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:57:58,610 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:57:58,644 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:57:58,644 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:57:58,644 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:57:58,644 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:57:58,644 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:57:58,644 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:57:58,645 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:57:58,645 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:57:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:57:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 17:57:58,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:57:58,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:57:58,690 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:57:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:57:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1138911038, now seen corresponding path program 1 times [2020-10-27 17:57:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:57:58,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352836973] [2020-10-27 17:57:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:57:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:59,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:59,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 17:57:59,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:59,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 17:57:59,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:57:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:57:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 17:57:59,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:57:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:59,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:59,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:59,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:59,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 17:57:59,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:57:59,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:59,833 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 17:57:59,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352836973] [2020-10-27 17:57:59,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:57:59,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 17:57:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632282654] [2020-10-27 17:57:59,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:57:59,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:57:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:57:59,869 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-27 17:58:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:58:18,486 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-27 17:58:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:58:18,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-27 17:58:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:58:18,521 INFO L225 Difference]: With dead ends: 3235 [2020-10-27 17:58:18,521 INFO L226 Difference]: Without dead ends: 2027 [2020-10-27 17:58:18,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-27 17:58:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-27 17:58:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 17:58:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-27 17:58:18,698 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 40 [2020-10-27 17:58:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:58:18,698 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-27 17:58:18,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:58:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-27 17:58:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 17:58:18,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:58:18,709 INFO L422 BasicCegarLoop]: trace histogram [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, 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 17:58:18,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:58:18,710 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:58:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:58:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1338551578, now seen corresponding path program 1 times [2020-10-27 17:58:18,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:58:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614282021] [2020-10-27 17:58:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:58:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:21,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:21,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 17:58:21,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:58:21,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-27 17:58:21,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 17:58:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 17:58:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 17:58:21,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:58:21,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:58:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:21,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:21,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:21,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:58:21,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:21,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:58:21,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:21,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:21,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:21,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:21,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:58:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:21,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:21,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:58:21,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 17:58:21,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:58:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 17:58:21,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:58:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:58:21,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614282021] [2020-10-27 17:58:21,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:58:21,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:58:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544631861] [2020-10-27 17:58:21,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:58:21,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:58:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:58:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:21,796 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 6 states. [2020-10-27 17:58:22,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 17:58:22,775 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-27 17:58:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:58:36,967 INFO L93 Difference]: Finished difference Result 4050 states and 6622 transitions. [2020-10-27 17:58:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 17:58:36,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-27 17:58:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:58:36,983 INFO L225 Difference]: With dead ends: 4050 [2020-10-27 17:58:36,983 INFO L226 Difference]: Without dead ends: 2014 [2020-10-27 17:58:36,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:58:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2020-10-27 17:58:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2010. [2020-10-27 17:58:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 17:58:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3290 transitions. [2020-10-27 17:58:37,045 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3290 transitions. Word has length 115 [2020-10-27 17:58:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:58:37,046 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3290 transitions. [2020-10-27 17:58:37,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:58:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3290 transitions. [2020-10-27 17:58:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 17:58:37,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:58:37,049 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 17:58:37,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:58:37,049 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:58:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:58:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 80198545, now seen corresponding path program 1 times [2020-10-27 17:58:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:58:37,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657771056] [2020-10-27 17:58:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:58:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:37,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:37,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:38,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:38,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 17:58:38,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:58:38,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-27 17:58:38,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:58:38,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 17:58:38,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 17:58:38,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:38,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:58:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:38,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:38,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:58:38,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:38,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:58:38,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:38,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:38,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:58:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:38,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:38,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:38,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:38,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 17:58:38,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:58:38,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 17:58:38,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:58:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 17:58:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:58:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:58:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657771056] [2020-10-27 17:58:38,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:58:38,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:58:38,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581986782] [2020-10-27 17:58:38,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:58:38,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:58:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:58:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:38,681 INFO L87 Difference]: Start difference. First operand 2010 states and 3290 transitions. Second operand 6 states. [2020-10-27 17:59:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:59:08,185 INFO L93 Difference]: Finished difference Result 9087 states and 15355 transitions. [2020-10-27 17:59:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:59:08,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-10-27 17:59:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:59:08,234 INFO L225 Difference]: With dead ends: 9087 [2020-10-27 17:59:08,235 INFO L226 Difference]: Without dead ends: 7083 [2020-10-27 17:59:08,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:59:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2020-10-27 17:59:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 7009. [2020-10-27 17:59:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7009 states. [2020-10-27 17:59:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 10524 transitions. [2020-10-27 17:59:08,537 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 10524 transitions. Word has length 122 [2020-10-27 17:59:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:59:08,538 INFO L481 AbstractCegarLoop]: Abstraction has 7009 states and 10524 transitions. [2020-10-27 17:59:08,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:59:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 10524 transitions. [2020-10-27 17:59:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 17:59:08,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:59:08,542 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:08,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:59:08,542 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:59:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:59:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2091554850, now seen corresponding path program 1 times [2020-10-27 17:59:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:59:08,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760214381] [2020-10-27 17:59:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:59:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:08,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:09,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:09,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 17:59:09,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:59:09,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-27 17:59:09,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:09,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:59:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 17:59:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 17:59:09,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:59:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:09,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:09,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:09,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:59:09,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:09,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:59:09,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:59:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:59:09,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:09,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:59:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:09,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:09,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 17:59:09,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 17:59:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:59:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 17:59:09,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:59:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:59:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760214381] [2020-10-27 17:59:10,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:59:10,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:59:10,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391645448] [2020-10-27 17:59:10,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:59:10,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:59:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:59:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:59:10,011 INFO L87 Difference]: Start difference. First operand 7009 states and 10524 transitions. Second operand 5 states. [2020-10-27 17:59:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:59:29,396 INFO L93 Difference]: Finished difference Result 20530 states and 31659 transitions. [2020-10-27 17:59:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:59:29,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-27 17:59:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:59:29,469 INFO L225 Difference]: With dead ends: 20530 [2020-10-27 17:59:29,469 INFO L226 Difference]: Without dead ends: 13527 [2020-10-27 17:59:29,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:59:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2020-10-27 17:59:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 13521. [2020-10-27 17:59:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13521 states. [2020-10-27 17:59:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13521 states to 13521 states and 19731 transitions. [2020-10-27 17:59:29,910 INFO L78 Accepts]: Start accepts. Automaton has 13521 states and 19731 transitions. Word has length 129 [2020-10-27 17:59:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:59:29,912 INFO L481 AbstractCegarLoop]: Abstraction has 13521 states and 19731 transitions. [2020-10-27 17:59:29,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:59:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13521 states and 19731 transitions. [2020-10-27 17:59:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 17:59:29,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:59:29,925 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:29,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:59:29,925 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:59:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:59:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -929094182, now seen corresponding path program 1 times [2020-10-27 17:59:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:59:29,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012902702] [2020-10-27 17:59:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:59:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:31,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:31,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 17:59:31,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:59:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-27 17:59:31,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:59:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 17:59:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 17:59:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:59:31,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:59:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:31,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:59:31,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:59:31,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:59:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:59:31,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:31,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:59:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:31,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:31,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 17:59:31,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 17:59:31,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:59:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 17:59:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:59:31,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012902702] [2020-10-27 17:59:31,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:59:31,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:59:31,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511370347] [2020-10-27 17:59:31,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:59:31,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:59:31,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:59:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:59:31,754 INFO L87 Difference]: Start difference. First operand 13521 states and 19731 transitions. Second operand 5 states. [2020-10-27 17:59:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:59:57,313 INFO L93 Difference]: Finished difference Result 40055 states and 60366 transitions. [2020-10-27 17:59:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:59:57,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-27 17:59:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:59:57,455 INFO L225 Difference]: With dead ends: 40055 [2020-10-27 17:59:57,456 INFO L226 Difference]: Without dead ends: 26540 [2020-10-27 17:59:57,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:59:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-10-27 17:59:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 26536. [2020-10-27 17:59:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26536 states. [2020-10-27 17:59:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26536 states to 26536 states and 37110 transitions. [2020-10-27 17:59:58,367 INFO L78 Accepts]: Start accepts. Automaton has 26536 states and 37110 transitions. Word has length 147 [2020-10-27 17:59:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:59:58,368 INFO L481 AbstractCegarLoop]: Abstraction has 26536 states and 37110 transitions. [2020-10-27 17:59:58,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:59:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26536 states and 37110 transitions. [2020-10-27 17:59:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 17:59:58,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:59:58,379 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:58,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:59:58,379 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:59:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:59:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1284325854, now seen corresponding path program 1 times [2020-10-27 17:59:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:59:58,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438747172] [2020-10-27 17:59:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:59:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:59,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:59,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:59,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-27 17:59:59,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:59:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1261 [2020-10-27 17:59:59,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:59:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 17:59:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 17:59:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:59,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:59:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:59,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:59,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:59:59,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:59,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:59:59,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:59,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:59:59,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:59:59,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:59:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:59,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:00,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:00,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 18:00:00,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:00:00,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 18:00:00,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 18:00:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:00:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:00:00,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438747172] [2020-10-27 18:00:00,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:00,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:00:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470232073] [2020-10-27 18:00:00,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:00:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:00:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:00:00,382 INFO L87 Difference]: Start difference. First operand 26536 states and 37110 transitions. Second operand 6 states. [2020-10-27 18:00:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:19,536 INFO L93 Difference]: Finished difference Result 53058 states and 74492 transitions. [2020-10-27 18:00:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:19,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2020-10-27 18:00:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:19,642 INFO L225 Difference]: With dead ends: 53058 [2020-10-27 18:00:19,643 INFO L226 Difference]: Without dead ends: 26528 [2020-10-27 18:00:19,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:00:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26528 states. [2020-10-27 18:00:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26528 to 26522. [2020-10-27 18:00:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26522 states. [2020-10-27 18:00:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26522 states to 26522 states and 37079 transitions. [2020-10-27 18:00:20,303 INFO L78 Accepts]: Start accepts. Automaton has 26522 states and 37079 transitions. Word has length 204 [2020-10-27 18:00:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:20,303 INFO L481 AbstractCegarLoop]: Abstraction has 26522 states and 37079 transitions. [2020-10-27 18:00:20,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:00:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 26522 states and 37079 transitions. [2020-10-27 18:00:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 18:00:20,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:20,313 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:00:20,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:00:20,313 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:20,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:20,314 INFO L82 PathProgramCache]: Analyzing trace with hash -589329873, now seen corresponding path program 1 times [2020-10-27 18:00:20,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:20,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697090163] [2020-10-27 18:00:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:22,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:23,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:25,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:25,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 18:00:25,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:00:25,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 18:00:25,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 182 [2020-10-27 18:00:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 18:00:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:00:25,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:25,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:25,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:00:25,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:25,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:25,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:25,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 18:00:25,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:25,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:00:25,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:25,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:25,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:25,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:25,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:25,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-27 18:00:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:25,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:25,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 18:00:25,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 18:00:25,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 18:00:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:00:25,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697090163] [2020-10-27 18:00:25,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:25,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:00:25,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045046786] [2020-10-27 18:00:25,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:00:25,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:00:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:25,852 INFO L87 Difference]: Start difference. First operand 26522 states and 37079 transitions. Second operand 5 states. [2020-10-27 18:00:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:46,878 INFO L93 Difference]: Finished difference Result 64433 states and 93043 transitions. [2020-10-27 18:00:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:46,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-10-27 18:00:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:47,039 INFO L225 Difference]: With dead ends: 64433 [2020-10-27 18:00:47,040 INFO L226 Difference]: Without dead ends: 37916 [2020-10-27 18:00:47,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:00:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37916 states. [2020-10-27 18:00:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37916 to 37891. [2020-10-27 18:00:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37891 states. [2020-10-27 18:00:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 51113 transitions. [2020-10-27 18:00:48,018 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 51113 transitions. Word has length 211 [2020-10-27 18:00:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:48,019 INFO L481 AbstractCegarLoop]: Abstraction has 37891 states and 51113 transitions. [2020-10-27 18:00:48,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:00:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 51113 transitions. [2020-10-27 18:00:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-27 18:00:48,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:48,048 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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 18:00:48,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:00:48,049 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:48,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1936721166, now seen corresponding path program 1 times [2020-10-27 18:00:48,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130565448] [2020-10-27 18:00:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-27 18:00:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:00:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-27 18:00:53,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-27 18:00:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 18:00:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:53,384 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:00:53,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:53,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:53,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:53,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:53,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:00:53,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:53,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:53,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:53,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:53,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:53,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 18:00:53,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:53,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:00:53,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:53,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:53,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:53,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:53,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:53,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-27 18:00:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:53,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:53,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:00:53,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:53,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 18:00:53,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:53,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:53,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:53,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:00:53,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:53,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-27 18:00:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:53,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:53,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:53,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 18:00:53,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 18:00:53,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:00:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-27 18:00:53,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 18:00:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130565448] [2020-10-27 18:00:54,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:54,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:00:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289042943] [2020-10-27 18:00:54,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:00:54,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:00:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:00:54,301 INFO L87 Difference]: Start difference. First operand 37891 states and 51113 transitions. Second operand 7 states. [2020-10-27 18:00:54,459 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:01:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:27,469 INFO L93 Difference]: Finished difference Result 82975 states and 116588 transitions. [2020-10-27 18:01:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:01:27,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 357 [2020-10-27 18:01:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:27,660 INFO L225 Difference]: With dead ends: 82975 [2020-10-27 18:01:27,661 INFO L226 Difference]: Without dead ends: 45090 [2020-10-27 18:01:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:01:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45090 states. [2020-10-27 18:01:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45090 to 43290. [2020-10-27 18:01:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43290 states. [2020-10-27 18:01:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43290 states to 43290 states and 58484 transitions. [2020-10-27 18:01:29,222 INFO L78 Accepts]: Start accepts. Automaton has 43290 states and 58484 transitions. Word has length 357 [2020-10-27 18:01:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:29,223 INFO L481 AbstractCegarLoop]: Abstraction has 43290 states and 58484 transitions. [2020-10-27 18:01:29,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:01:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 43290 states and 58484 transitions. [2020-10-27 18:01:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-10-27 18:01:29,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:29,263 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:29,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:01:29,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:29,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1213984300, now seen corresponding path program 1 times [2020-10-27 18:01:29,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:29,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329982699] [2020-10-27 18:01:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:29,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:32,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking...