/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/Problem17_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:59:44,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:59:44,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:59:44,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:59:44,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:59:44,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:59:44,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:59:44,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:59:44,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:59:44,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:59:44,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:59:44,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:59:44,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:59:44,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:59:44,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:59:44,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:59:44,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:59:44,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:59:44,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:59:44,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:59:44,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:59:44,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:59:44,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:59:44,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:59:44,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:59:44,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:59:44,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:59:44,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:59:44,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:59:44,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:59:44,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:59:44,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:59:44,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:59:44,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:59:44,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:59:44,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:59:44,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:59:44,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:59:44,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:59:44,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:59:44,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:59:44,335 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 18:59:44,379 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:59:44,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:59:44,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:59:44,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:59:44,382 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:59:44,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:59:44,383 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:59:44,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:59:44,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:59:44,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:59:44,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:59:44,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:59:44,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:59:44,385 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:59:44,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:59:44,386 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:59:44,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:59:44,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:59:44,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:59:44,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:59:44,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:59:44,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:59:44,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:59:44,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:59:44,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:59:44,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:59:44,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:59:44,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:59:44,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:59:44,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:59:44,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:59:44,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:59:44,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:59:44,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:59:44,847 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:59:44,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label47.c [2020-10-27 18:59:44,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60f3287c4/2fc50d4e9823476b8241eb76d301f39f/FLAG8041abf36 [2020-10-27 18:59:45,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:59:45,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label47.c [2020-10-27 18:59:46,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60f3287c4/2fc50d4e9823476b8241eb76d301f39f/FLAG8041abf36 [2020-10-27 18:59:46,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60f3287c4/2fc50d4e9823476b8241eb76d301f39f [2020-10-27 18:59:46,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:59:46,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:59:46,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:59:46,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:59:46,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:59:46,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:59:46" (1/1) ... [2020-10-27 18:59:46,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d19c63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:46, skipping insertion in model container [2020-10-27 18:59:46,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:59:46" (1/1) ... [2020-10-27 18:59:46,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:59:46,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:59:47,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:59:47,729 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:59:48,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:59:48,308 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:59:48,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48 WrapperNode [2020-10-27 18:59:48,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:59:48,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:59:48,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:59:48,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:59:48,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (1/1) ... [2020-10-27 18:59:48,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:59:48,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:59:48,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:59:48,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:59:48,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (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 18:59:48,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:59:48,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:59:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:59:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:59:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:59:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:59:48,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:59:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:59:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:59:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:59:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:59:57,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:59:57,950 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:59:57,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:59:57 BoogieIcfgContainer [2020-10-27 18:59:57,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:59:57,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:59:57,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:59:57,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:59:57,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:59:46" (1/3) ... [2020-10-27 18:59:57,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b8e3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:59:57, skipping insertion in model container [2020-10-27 18:59:57,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:59:48" (2/3) ... [2020-10-27 18:59:57,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b8e3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:59:57, skipping insertion in model container [2020-10-27 18:59:57,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:59:57" (3/3) ... [2020-10-27 18:59:57,963 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label47.c [2020-10-27 18:59:57,977 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:59:57,983 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:59:57,998 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:59:58,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:59:58,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:59:58,035 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:59:58,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:59:58,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:59:58,036 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:59:58,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:59:58,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:59:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:59:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 18:59:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:58,081 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] [2020-10-27 18:59:58,082 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 731131835, now seen corresponding path program 1 times [2020-10-27 18:59:58,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:58,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286230804] [2020-10-27 18:59:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:59,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:59,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 18:59:59,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:59,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 18:59:59,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:59,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:59:59,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:59:59,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 18:59:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:59:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:59,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:59,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:59,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:59,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:59,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:59:59,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:59:59,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:59,350 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 18:59:59,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286230804] [2020-10-27 18:59:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:59:59,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:59:59,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883964395] [2020-10-27 18:59:59,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:59:59,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:59:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:59:59,387 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 19:00:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:00:13,753 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 19:00:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:00:13,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-27 19:00:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:00:13,791 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 19:00:13,791 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 19:00:13,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 19:00:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 19:00:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 19:00:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 19:00:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 19:00:13,985 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 51 [2020-10-27 19:00:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:13,986 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 19:00:13,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:00:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 19:00:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 19:00:13,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:13,993 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, 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] [2020-10-27 19:00:13,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:00:13,994 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2038175430, now seen corresponding path program 1 times [2020-10-27 19:00:13,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:13,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833794718] [2020-10-27 19:00:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:14,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:15,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:15,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 19:00:15,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:00:15,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1691 [2020-10-27 19:00:15,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 19:00:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:00:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:00:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:15,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:15,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:15,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:15,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:00:15,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:15,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:00:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:15,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:16,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:16,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:00:16,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:16,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 19:00:16,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:00:16,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:00:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833794718] [2020-10-27 19:00:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:00:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649333042] [2020-10-27 19:00:16,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:00:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:00:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:00:16,161 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 19:00:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:00:32,046 INFO L93 Difference]: Finished difference Result 2886 states and 4481 transitions. [2020-10-27 19:00:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:00:32,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-27 19:00:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:00:32,060 INFO L225 Difference]: With dead ends: 2886 [2020-10-27 19:00:32,061 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 19:00:32,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:00:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 19:00:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 19:00:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 19:00:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2588 transitions. [2020-10-27 19:00:32,137 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2588 transitions. Word has length 122 [2020-10-27 19:00:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:32,138 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2588 transitions. [2020-10-27 19:00:32,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:00:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2588 transitions. [2020-10-27 19:00:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 19:00:32,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:32,143 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, 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] [2020-10-27 19:00:32,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:00:32,143 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1953755857, now seen corresponding path program 1 times [2020-10-27 19:00:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:32,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514413236] [2020-10-27 19:00:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:33,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:33,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 19:00:33,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:00:33,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-27 19:00:33,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:33,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:00:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:00:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 19:00:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:33,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:33,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:33,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:33,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 19:00:33,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:00:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:34,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:34,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:00:34,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:34,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 19:00:34,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:00:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:00:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 19:00:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:00:34,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514413236] [2020-10-27 19:00:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:00:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26174338] [2020-10-27 19:00:34,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:00:34,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:00:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:00:34,286 INFO L87 Difference]: Start difference. First operand 1885 states and 2588 transitions. Second operand 8 states. [2020-10-27 19:01:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:01:00,173 INFO L93 Difference]: Finished difference Result 6541 states and 9317 transitions. [2020-10-27 19:01:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:01:00,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2020-10-27 19:01:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:01:00,211 INFO L225 Difference]: With dead ends: 6541 [2020-10-27 19:01:00,211 INFO L226 Difference]: Without dead ends: 4662 [2020-10-27 19:01:00,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:01:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2020-10-27 19:01:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 2852. [2020-10-27 19:01:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-10-27 19:01:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4109 transitions. [2020-10-27 19:01:00,380 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4109 transitions. Word has length 125 [2020-10-27 19:01:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:01:00,382 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4109 transitions. [2020-10-27 19:01:00,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:01:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4109 transitions. [2020-10-27 19:01:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:01:00,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:00,397 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, 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] [2020-10-27 19:01:00,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:01:00,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash 747798986, now seen corresponding path program 1 times [2020-10-27 19:01:00,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:00,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249720354] [2020-10-27 19:01:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:00,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:01,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:01,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 19:01:01,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:01:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-27 19:01:01,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 19:01:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:01:01,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:01:01,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:01,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:01,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:01,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:01,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:01,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:01:01,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:01:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:01:01,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:01:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:01,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:01,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:01:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 19:01:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:01:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:01:01,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249720354] [2020-10-27 19:01:01,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:01:01,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:01:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764926834] [2020-10-27 19:01:01,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:01:01,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:01:01,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:01:01,868 INFO L87 Difference]: Start difference. First operand 2852 states and 4109 transitions. Second operand 5 states. [2020-10-27 19:01:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:01:19,192 INFO L93 Difference]: Finished difference Result 7069 states and 10623 transitions. [2020-10-27 19:01:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:01:19,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-27 19:01:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:01:19,229 INFO L225 Difference]: With dead ends: 7069 [2020-10-27 19:01:19,229 INFO L226 Difference]: Without dead ends: 4223 [2020-10-27 19:01:19,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:01:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2020-10-27 19:01:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4204. [2020-10-27 19:01:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-27 19:01:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6025 transitions. [2020-10-27 19:01:19,386 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6025 transitions. Word has length 130 [2020-10-27 19:01:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:01:19,387 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6025 transitions. [2020-10-27 19:01:19,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:01:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6025 transitions. [2020-10-27 19:01:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 19:01:19,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:19,390 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, 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] [2020-10-27 19:01:19,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:01:19,391 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash 362601301, now seen corresponding path program 1 times [2020-10-27 19:01:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:19,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248761075] [2020-10-27 19:01:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:21,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:21,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 19:01:21,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:01:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-27 19:01:21,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 19:01:21,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:01:21,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:21,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:21,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:21,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:21,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:01:21,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:01:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:01:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:21,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:01:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:21,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:21,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 19:01:21,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:21,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 19:01:21,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 19:01:21,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:01:21,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248761075] [2020-10-27 19:01:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:01:21,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:01:21,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440689605] [2020-10-27 19:01:21,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:01:21,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:01:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:01:21,584 INFO L87 Difference]: Start difference. First operand 4204 states and 6025 transitions. Second operand 5 states. [2020-10-27 19:01:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:01:39,028 INFO L93 Difference]: Finished difference Result 12392 states and 18210 transitions. [2020-10-27 19:01:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:01:39,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-27 19:01:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:01:39,119 INFO L225 Difference]: With dead ends: 12392 [2020-10-27 19:01:39,119 INFO L226 Difference]: Without dead ends: 8194 [2020-10-27 19:01:39,135 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 19:01:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2020-10-27 19:01:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 6869. [2020-10-27 19:01:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6869 states. [2020-10-27 19:01:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6869 states to 6869 states and 10398 transitions. [2020-10-27 19:01:39,391 INFO L78 Accepts]: Start accepts. Automaton has 6869 states and 10398 transitions. Word has length 153 [2020-10-27 19:01:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:01:39,392 INFO L481 AbstractCegarLoop]: Abstraction has 6869 states and 10398 transitions. [2020-10-27 19:01:39,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:01:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6869 states and 10398 transitions. [2020-10-27 19:01:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 19:01:39,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:39,397 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:01:39,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:01:39,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -940547970, now seen corresponding path program 1 times [2020-10-27 19:01:39,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:39,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006591659] [2020-10-27 19:01:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:42,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:42,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 19:01:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:01:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2923 [2020-10-27 19:01:42,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 19:01:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 19:01:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:42,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:42,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:42,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:01:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:01:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:42,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:42,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:01:42,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:42,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 19:01:42,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:01:42,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 19:01:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:42,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:42,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:42,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:01:42,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:42,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 19:01:42,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:01:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 19:01:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:01:43,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006591659] [2020-10-27 19:01:43,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:01:43,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:01:43,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463192646] [2020-10-27 19:01:43,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:01:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:01:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:01:43,106 INFO L87 Difference]: Start difference. First operand 6869 states and 10398 transitions. Second operand 7 states. [2020-10-27 19:01:44,665 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:02:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:02:15,352 INFO L93 Difference]: Finished difference Result 20814 states and 34205 transitions. [2020-10-27 19:02:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:02:15,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 204 [2020-10-27 19:02:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:02:15,454 INFO L225 Difference]: With dead ends: 20814 [2020-10-27 19:02:15,454 INFO L226 Difference]: Without dead ends: 13951 [2020-10-27 19:02:15,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 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 19:02:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2020-10-27 19:02:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 12926. [2020-10-27 19:02:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12926 states. [2020-10-27 19:02:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12926 states to 12926 states and 19881 transitions. [2020-10-27 19:02:16,079 INFO L78 Accepts]: Start accepts. Automaton has 12926 states and 19881 transitions. Word has length 204 [2020-10-27 19:02:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:02:16,080 INFO L481 AbstractCegarLoop]: Abstraction has 12926 states and 19881 transitions. [2020-10-27 19:02:16,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:02:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 12926 states and 19881 transitions. [2020-10-27 19:02:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-27 19:02:16,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:02:16,088 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, 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] [2020-10-27 19:02:16,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:02:16,088 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:02:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:02:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1328461556, now seen corresponding path program 1 times [2020-10-27 19:02:16,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:02:16,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814159231] [2020-10-27 19:02:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:02:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:16,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:18,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:18,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 19:02:18,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:02:18,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1887 [2020-10-27 19:02:18,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:18,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:02:18,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-10-27 19:02:18,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:02:18,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:18,334 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:02:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:02:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:18,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:18,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:18,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:02:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:02:18,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:18,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:02:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:18,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:18,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 19:02:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 19:02:18,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:02:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 19:02:18,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:02:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814159231] [2020-10-27 19:02:18,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:02:18,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:02:18,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368937755] [2020-10-27 19:02:18,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:02:18,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:02:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:02:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:02:18,791 INFO L87 Difference]: Start difference. First operand 12926 states and 19881 transitions. Second operand 5 states. [2020-10-27 19:02:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:02:45,867 INFO L93 Difference]: Finished difference Result 34762 states and 55911 transitions. [2020-10-27 19:02:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:02:45,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2020-10-27 19:02:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:02:45,991 INFO L225 Difference]: With dead ends: 34762 [2020-10-27 19:02:45,991 INFO L226 Difference]: Without dead ends: 21846 [2020-10-27 19:02:46,035 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 19:02:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21846 states. [2020-10-27 19:02:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21846 to 20944. [2020-10-27 19:02:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20944 states. [2020-10-27 19:02:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20944 states to 20944 states and 31599 transitions. [2020-10-27 19:02:46,808 INFO L78 Accepts]: Start accepts. Automaton has 20944 states and 31599 transitions. Word has length 206 [2020-10-27 19:02:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:02:46,809 INFO L481 AbstractCegarLoop]: Abstraction has 20944 states and 31599 transitions. [2020-10-27 19:02:46,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:02:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20944 states and 31599 transitions. [2020-10-27 19:02:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 19:02:46,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:02:46,819 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, 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, 1, 1, 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 19:02:46,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:02:46,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:02:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:02:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash 206060333, now seen corresponding path program 1 times [2020-10-27 19:02:46,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:02:46,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742354265] [2020-10-27 19:02:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:02:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:46,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:46,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:50,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:50,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:51,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-27 19:02:51,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:02:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:52,124 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:02:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:02:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:52,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:52,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:02:52,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:52,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:02:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:02:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:52,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 19:02:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:52,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:52,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:02:52,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:52,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 19:02:52,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:02:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:02:52,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 19:02:52,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742354265] [2020-10-27 19:02:52,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:02:52,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:02:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550236862] [2020-10-27 19:02:52,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:02:52,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:02:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:02:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:02:52,500 INFO L87 Difference]: Start difference. First operand 20944 states and 31599 transitions. Second operand 5 states. [2020-10-27 19:02:52,690 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:03:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:03:13,988 INFO L93 Difference]: Finished difference Result 46273 states and 72784 transitions. [2020-10-27 19:03:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:03:13,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2020-10-27 19:03:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:03:14,209 INFO L225 Difference]: With dead ends: 46273 [2020-10-27 19:03:14,210 INFO L226 Difference]: Without dead ends: 28043 [2020-10-27 19:03:14,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:03:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28043 states. [2020-10-27 19:03:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28043 to 27144. [2020-10-27 19:03:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27144 states. [2020-10-27 19:03:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27144 states to 27144 states and 40557 transitions. [2020-10-27 19:03:15,139 INFO L78 Accepts]: Start accepts. Automaton has 27144 states and 40557 transitions. Word has length 208 [2020-10-27 19:03:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:03:15,140 INFO L481 AbstractCegarLoop]: Abstraction has 27144 states and 40557 transitions. [2020-10-27 19:03:15,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:03:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27144 states and 40557 transitions. [2020-10-27 19:03:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 19:03:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:03:15,151 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:15,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:03:15,152 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:03:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:03:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1834864738, now seen corresponding path program 1 times [2020-10-27 19:03:15,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:03:15,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833756691] [2020-10-27 19:03:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:03:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:15,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:15,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:19,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:19,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 19:03:19,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:03:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4524 [2020-10-27 19:03:19,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:19,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:03:19,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 19:03:19,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 19:03:19,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:20,083 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:03:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:03:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:20,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:03:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:20,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:20,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 19:03:20,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:20,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 19:03:20,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:20,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:03:20,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:20,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 19:03:20,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:20,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-27 19:03:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:20,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:20,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:03:20,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 19:03:20,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:03:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:03:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 19:03:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:03:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833756691] [2020-10-27 19:03:20,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:03:20,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:03:20,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278760986] [2020-10-27 19:03:20,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:03:20,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:03:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:03:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:03:20,918 INFO L87 Difference]: Start difference. First operand 27144 states and 40557 transitions. Second operand 8 states. [2020-10-27 19:03:21,123 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:03:22,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78