/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/Problem05_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:21:38,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:21:38,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:21:38,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:21:38,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:21:38,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:21:38,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:21:38,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:21:38,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:21:38,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:21:38,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:21:38,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:21:38,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:21:38,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:21:38,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:21:38,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:21:38,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:21:38,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:21:38,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:21:39,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:21:39,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:21:39,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:21:39,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:21:39,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:21:39,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:21:39,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:21:39,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:21:39,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:21:39,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:21:39,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:21:39,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:21:39,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:21:39,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:21:39,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:21:39,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:21:39,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:21:39,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:21:39,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:21:39,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:21:39,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:21:39,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:21:39,040 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 16:21:39,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:21:39,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:21:39,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:21:39,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:21:39,071 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:21:39,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:21:39,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:21:39,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:21:39,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:21:39,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:21:39,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:21:39,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:21:39,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:21:39,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:21:39,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:21:39,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:21:39,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:21:39,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:21:39,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:21:39,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:21:39,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:21:39,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:21:39,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:21:39,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:21:39,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:21:39,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:21:39,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:21:39,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:21:39,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:21:39,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:21:39,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:21:39,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:21:39,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:21:39,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:21:39,492 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:21:39,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label56.c [2020-10-27 16:21:39,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbbf9c7f6/7bccfadf25774932bba6de94ad150d19/FLAGf7ae38f40 [2020-10-27 16:21:41,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:21:41,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label56.c [2020-10-27 16:21:41,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbbf9c7f6/7bccfadf25774932bba6de94ad150d19/FLAGf7ae38f40 [2020-10-27 16:21:41,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbbf9c7f6/7bccfadf25774932bba6de94ad150d19 [2020-10-27 16:21:41,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:21:41,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:21:41,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:21:41,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:21:41,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:21:41,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:21:41" (1/1) ... [2020-10-27 16:21:41,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55176a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:41, skipping insertion in model container [2020-10-27 16:21:41,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:21:41" (1/1) ... [2020-10-27 16:21:41,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:21:41,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:21:44,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:21:44,259 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:21:45,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:21:45,598 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:21:45,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45 WrapperNode [2020-10-27 16:21:45,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:21:45,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:21:45,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:21:45,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:21:45,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:45,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:45,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:45,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:46,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:46,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:46,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... [2020-10-27 16:21:46,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:21:46,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:21:46,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:21:46,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:21:46,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:21:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:21:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:21:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:21:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:21:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:21:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:21:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:21:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:21:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:21:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:21:56,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:21:56,382 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:21:56,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:21:56 BoogieIcfgContainer [2020-10-27 16:21:56,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:21:56,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:21:56,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:21:56,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:21:56,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:21:41" (1/3) ... [2020-10-27 16:21:56,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e89eb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:21:56, skipping insertion in model container [2020-10-27 16:21:56,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:21:45" (2/3) ... [2020-10-27 16:21:56,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e89eb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:21:56, skipping insertion in model container [2020-10-27 16:21:56,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:21:56" (3/3) ... [2020-10-27 16:21:56,397 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label56.c [2020-10-27 16:21:56,409 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:21:56,416 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:21:56,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:21:56,469 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:21:56,469 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:21:56,469 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:21:56,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:21:56,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:21:56,470 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:21:56,470 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:21:56,470 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:21:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:21:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1695 [2020-10-27 16:21:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:21:56,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:56,791 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:21:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:21:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1207321793, now seen corresponding path program 1 times [2020-10-27 16:21:56,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:21:56,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541259566] [2020-10-27 16:21:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:21:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:21:58,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:02,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:02,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1718 [2020-10-27 16:22:02,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:02,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 16:22:02,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:22:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:22:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1709 [2020-10-27 16:22:02,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:22:04,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:22:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:04,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:04,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:04,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:22:04,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 16:22:04,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:22:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:22:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:22:04,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:22:07,691 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 16:22:07,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541259566] [2020-10-27 16:22:07,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:22:07,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:22:07,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753440449] [2020-10-27 16:22:07,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:22:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:22:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:22:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:22:07,721 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-27 16:22:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:22:30,572 INFO L93 Difference]: Finished difference Result 6365 states and 11967 transitions. [2020-10-27 16:22:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:22:30,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1694 [2020-10-27 16:22:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:22:30,636 INFO L225 Difference]: With dead ends: 6365 [2020-10-27 16:22:30,636 INFO L226 Difference]: Without dead ends: 4075 [2020-10-27 16:22:30,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:22:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-27 16:22:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4005. [2020-10-27 16:22:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-27 16:22:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6505 transitions. [2020-10-27 16:22:30,903 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6505 transitions. Word has length 1694 [2020-10-27 16:22:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:22:30,909 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 6505 transitions. [2020-10-27 16:22:30,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:22:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6505 transitions. [2020-10-27 16:22:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1706 [2020-10-27 16:22:31,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:22:31,035 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:22:31,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:22:31,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:22:31,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:22:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1190514231, now seen corresponding path program 1 times [2020-10-27 16:22:31,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:22:31,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064132358] [2020-10-27 16:22:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:22:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:36,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:36,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1731 [2020-10-27 16:22:36,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:22:36,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5240 [2020-10-27 16:22:36,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:22:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 16:22:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1706 [2020-10-27 16:22:36,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:22:38,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:22:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:38,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:38,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:38,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:22:38,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:38,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:22:38,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:22:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:22:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:22:38,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:22:38,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:22:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:38,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:38,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:38,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 16:22:38,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 16:22:38,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:22:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:22:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 16:22:38,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:22:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:22:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064132358] [2020-10-27 16:22:41,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:22:41,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:22:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208966496] [2020-10-27 16:22:41,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:22:41,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:22:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:22:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:22:41,417 INFO L87 Difference]: Start difference. First operand 4005 states and 6505 transitions. Second operand 6 states. [2020-10-27 16:23:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:23:20,620 INFO L93 Difference]: Finished difference Result 15171 states and 25096 transitions. [2020-10-27 16:23:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:23:20,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1705 [2020-10-27 16:23:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:23:20,691 INFO L225 Difference]: With dead ends: 15171 [2020-10-27 16:23:20,692 INFO L226 Difference]: Without dead ends: 11172 [2020-10-27 16:23:20,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:23:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11172 states. [2020-10-27 16:23:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11172 to 11138. [2020-10-27 16:23:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11138 states. [2020-10-27 16:23:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 16145 transitions. [2020-10-27 16:23:21,028 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 16145 transitions. Word has length 1705 [2020-10-27 16:23:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:23:21,032 INFO L481 AbstractCegarLoop]: Abstraction has 11138 states and 16145 transitions. [2020-10-27 16:23:21,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:23:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 16145 transitions. [2020-10-27 16:23:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2020-10-27 16:23:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:23:21,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:21,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:23:21,094 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:23:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:23:21,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1338846065, now seen corresponding path program 1 times [2020-10-27 16:23:21,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:23:21,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634689208] [2020-10-27 16:23:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:23:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:21,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:26,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:26,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1746 [2020-10-27 16:23:26,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:23:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-27 16:23:26,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 16:23:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 16:23:26,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1426 [2020-10-27 16:23:26,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:30,985 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 16:23:31,631 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-27 16:23:31,795 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 16:23:31,971 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 16:23:32,134 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-27 16:23:32,296 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 16:23:32,452 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 16:23:32,612 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 16:23:32,908 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-27 16:23:33,115 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-10-27 16:23:33,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:23:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:33,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:33,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:23:33,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:23:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:23:33,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:23:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:23:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:23:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:23:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:33,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:23:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:23:33,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 16:23:33,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:23:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:23:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 16:23:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:23:56,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634689208] [2020-10-27 16:23:56,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:23:56,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 16:23:56,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795206407] [2020-10-27 16:23:56,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 16:23:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:23:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 16:23:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-27 16:23:56,091 INFO L87 Difference]: Start difference. First operand 11138 states and 16145 transitions. Second operand 25 states. [2020-10-27 16:23:57,071 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:23:57,318 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:24:08,696 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:24:08,959 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:24:20,717 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:24:20,994 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:24:31,806 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-27 16:24:33,426 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-27 16:24:33,710 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:24:37,762 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 16:24:39,737 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2020-10-27 16:24:46,461 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 16:24:46,744 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 16:24:56,799 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:24:59,411 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 16:24:59,697 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:25:04,314 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2020-10-27 16:25:13,198 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 16:25:13,411 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:25:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:25:26,825 INFO L93 Difference]: Finished difference Result 23725 states and 35230 transitions. [2020-10-27 16:25:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 16:25:26,827 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1720 [2020-10-27 16:25:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:25:26,891 INFO L225 Difference]: With dead ends: 23725 [2020-10-27 16:25:26,891 INFO L226 Difference]: Without dead ends: 12593 [2020-10-27 16:25:26,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 16:25:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12593 states. [2020-10-27 16:25:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12593 to 12569. [2020-10-27 16:25:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12569 states. [2020-10-27 16:25:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 17613 transitions. [2020-10-27 16:25:27,218 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 17613 transitions. Word has length 1720 [2020-10-27 16:25:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:25:27,220 INFO L481 AbstractCegarLoop]: Abstraction has 12569 states and 17613 transitions. [2020-10-27 16:25:27,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 16:25:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 17613 transitions. [2020-10-27 16:25:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2020-10-27 16:25:27,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:25:27,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:27,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:25:27,279 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:25:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:25:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1344808200, now seen corresponding path program 1 times [2020-10-27 16:25:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:25:27,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497950951] [2020-10-27 16:25:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:25:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking...