/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:08:04,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:08:04,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:08:04,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:08:04,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:08:04,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:08:04,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:08:04,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:08:04,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:08:04,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:08:04,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:08:04,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:08:04,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:08:04,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:08:04,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:08:04,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:08:04,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:08:04,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:08:04,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:08:04,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:08:04,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:08:04,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:08:04,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:08:04,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:08:04,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:08:04,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:08:04,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:08:04,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:08:04,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:08:04,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:08:04,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:08:04,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:08:04,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:08:04,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:08:04,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:08:04,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:08:04,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:08:04,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:08:04,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:08:04,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:08:04,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:08:04,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 11:08:04,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:08:04,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:08:04,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:08:04,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:08:04,524 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:08:04,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:08:04,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:08:04,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:08:04,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:08:04,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:08:04,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:08:04,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:08:04,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:08:04,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:08:04,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:08:04,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:08:04,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:08:04,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:08:04,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:08:04,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:08:04,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:08:04,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:08:04,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:08:04,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:08:04,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:08:04,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:08:04,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:08:04,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:08:04,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:08:04,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:08:04,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:08:04,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:08:04,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:08:04,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:08:04,978 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:08:04,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label52.c [2020-10-28 11:08:05,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db57bcbe/1b27425f37294733895d9d2c67827e35/FLAG77da5f9c8 [2020-10-28 11:08:06,450 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:08:06,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label52.c [2020-10-28 11:08:06,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db57bcbe/1b27425f37294733895d9d2c67827e35/FLAG77da5f9c8 [2020-10-28 11:08:06,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db57bcbe/1b27425f37294733895d9d2c67827e35 [2020-10-28 11:08:06,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:08:06,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:08:06,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:08:06,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:08:06,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:08:06,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:08:06" (1/1) ... [2020-10-28 11:08:06,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478994f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:06, skipping insertion in model container [2020-10-28 11:08:06,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:08:06" (1/1) ... [2020-10-28 11:08:06,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:08:06,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:08:09,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:08:09,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:08:10,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:08:10,276 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:08:10,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10 WrapperNode [2020-10-28 11:08:10,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:08:10,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:08:10,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:08:10,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:08:10,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:10,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... [2020-10-28 11:08:11,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:08:11,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:08:11,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:08:11,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:08:11,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:08:11,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:08:11,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:08:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:08:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:08:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:08:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:08:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:08:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:08:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:08:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:08:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:08:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:08:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:08:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:08:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:08:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:08:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:08:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:08:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:08:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:08:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:08:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:08:19,359 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:08:19,359 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:08:19,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:08:19 BoogieIcfgContainer [2020-10-28 11:08:19,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:08:19,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:08:19,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:08:19,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:08:19,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:08:06" (1/3) ... [2020-10-28 11:08:19,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721af3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:08:19, skipping insertion in model container [2020-10-28 11:08:19,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:08:10" (2/3) ... [2020-10-28 11:08:19,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721af3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:08:19, skipping insertion in model container [2020-10-28 11:08:19,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:08:19" (3/3) ... [2020-10-28 11:08:19,374 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label52.c [2020-10-28 11:08:19,386 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:08:19,393 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:08:19,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:08:19,443 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:08:19,444 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:08:19,444 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:08:19,444 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:08:19,444 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:08:19,444 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:08:19,444 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:08:19,444 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:08:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:08:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2020-10-28 11:08:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:08:19,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:08:19,666 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:08:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:08:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1908649092, now seen corresponding path program 1 times [2020-10-28 11:08:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:08:19,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426230663] [2020-10-28 11:08:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:08:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:21,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:25,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:25,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1017 [2020-10-28 11:08:25,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:08:25,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-28 11:08:25,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:25,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:08:25,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:08:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1008 [2020-10-28 11:08:25,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 11:08:27,381 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:08:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:08:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:27,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:27,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:08:27,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:27,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 11:08:27,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:27,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:08:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:08:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:08:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:08:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:08:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426230663] [2020-10-28 11:08:28,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:08:28,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:08:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016738002] [2020-10-28 11:08:28,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:08:28,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:08:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:08:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:08:28,829 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:08:29,154 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:08:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:08:46,023 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-28 11:08:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:08:46,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 999 [2020-10-28 11:08:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:08:46,083 INFO L225 Difference]: With dead ends: 3770 [2020-10-28 11:08:46,083 INFO L226 Difference]: Without dead ends: 2387 [2020-10-28 11:08:46,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:08:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-28 11:08:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-28 11:08:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-28 11:08:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-28 11:08:46,333 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 999 [2020-10-28 11:08:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:08:46,337 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-28 11:08:46,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:08:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-28 11:08:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2020-10-28 11:08:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:08:46,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:08:46,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:08:46,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:08:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:08:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2081222827, now seen corresponding path program 1 times [2020-10-28 11:08:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:08:46,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221029933] [2020-10-28 11:08:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:08:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:49,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:51,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1031 [2020-10-28 11:08:51,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:08:51,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5259 [2020-10-28 11:08:51,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:51,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:08:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:08:51,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:08:51,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:08:52,546 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:08:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:08:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:52,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:52,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:52,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:08:52,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:52,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 11:08:52,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:52,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:08:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:08:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:08:52,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:52,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:08:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:52,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:52,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:08:52,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:52,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 11:08:52,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:52,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:08:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:08:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:08:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:08:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221029933] [2020-10-28 11:08:53,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:08:53,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:08:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986645818] [2020-10-28 11:08:53,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:08:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:08:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:08:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:08:53,582 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-28 11:08:53,865 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:08:55,061 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:09:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:09:14,407 INFO L93 Difference]: Finished difference Result 6954 states and 11751 transitions. [2020-10-28 11:09:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:09:14,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1011 [2020-10-28 11:09:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:09:14,445 INFO L225 Difference]: With dead ends: 6954 [2020-10-28 11:09:14,446 INFO L226 Difference]: Without dead ends: 4586 [2020-10-28 11:09:14,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:09:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-10-28 11:09:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4542. [2020-10-28 11:09:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2020-10-28 11:09:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 7000 transitions. [2020-10-28 11:09:14,622 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 7000 transitions. Word has length 1011 [2020-10-28 11:09:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:09:14,622 INFO L481 AbstractCegarLoop]: Abstraction has 4542 states and 7000 transitions. [2020-10-28 11:09:14,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:09:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 7000 transitions. [2020-10-28 11:09:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2020-10-28 11:09:14,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:09:14,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:09:14,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:09:14,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:09:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:09:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1714877043, now seen corresponding path program 1 times [2020-10-28 11:09:14,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:09:14,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866155622] [2020-10-28 11:09:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:09:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:14,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:19,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:19,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1035 [2020-10-28 11:09:19,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:09:19,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-28 11:09:19,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:19,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:09:19,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:09:19,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:09:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 11:09:20,401 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:09:20,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:09:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:20,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:20,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:09:20,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:09:20,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 11:09:20,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:20,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:09:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:09:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:09:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:09:20,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:09:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:20,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:20,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:09:20,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:09:20,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 11:09:20,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:20,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:09:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:09:20,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:09:20,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:09:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:09:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866155622] [2020-10-28 11:09:21,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:09:21,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:09:21,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316896081] [2020-10-28 11:09:21,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:09:21,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:09:21,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:09:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:09:21,346 INFO L87 Difference]: Start difference. First operand 4542 states and 7000 transitions. Second operand 7 states. [2020-10-28 11:09:21,617 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:09:22,058 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:09:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:09:43,931 INFO L93 Difference]: Finished difference Result 13626 states and 21399 transitions. [2020-10-28 11:09:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:09:43,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1015 [2020-10-28 11:09:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:09:43,982 INFO L225 Difference]: With dead ends: 13626 [2020-10-28 11:09:43,982 INFO L226 Difference]: Without dead ends: 9090 [2020-10-28 11:09:43,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:09:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2020-10-28 11:09:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 8948. [2020-10-28 11:09:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8948 states. [2020-10-28 11:09:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 12863 transitions. [2020-10-28 11:09:44,295 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 12863 transitions. Word has length 1015 [2020-10-28 11:09:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:09:44,297 INFO L481 AbstractCegarLoop]: Abstraction has 8948 states and 12863 transitions. [2020-10-28 11:09:44,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:09:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 12863 transitions. [2020-10-28 11:09:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2020-10-28 11:09:44,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:09:44,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:09:44,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:09:44,361 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:09:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:09:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash 960362634, now seen corresponding path program 1 times [2020-10-28 11:09:44,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:09:44,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841579583] [2020-10-28 11:09:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:09:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:44,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:49,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:49,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1041 [2020-10-28 11:09:49,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:09:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-28 11:09:49,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:49,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:49,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:09:49,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:09:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:09:49,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 11:09:50,171 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:09:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:09:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:50,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:50,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:50,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:09:50,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:09:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:09:50,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:50,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:50,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:09:50,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:09:50,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:09:50,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:09:50,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:09:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:50,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:50,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:09:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:09:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 11:09:50,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:50,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:09:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:09:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:09:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:09:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:09:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:09:50,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:09:50,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:09:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:09:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:09:50,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:09:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:09:51,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841579583] [2020-10-28 11:09:51,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:09:51,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:09:51,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741131744] [2020-10-28 11:09:51,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:09:51,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:09:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:09:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:09:51,212 INFO L87 Difference]: Start difference. First operand 8948 states and 12863 transitions. Second operand 7 states. [2020-10-28 11:09:51,577 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:09:54,069 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:10:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:10:17,613 INFO L93 Difference]: Finished difference Result 27474 states and 42542 transitions. [2020-10-28 11:10:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:10:17,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1019 [2020-10-28 11:10:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:10:17,718 INFO L225 Difference]: With dead ends: 27474 [2020-10-28 11:10:17,718 INFO L226 Difference]: Without dead ends: 18532 [2020-10-28 11:10:17,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:10:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2020-10-28 11:10:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18108. [2020-10-28 11:10:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18108 states. [2020-10-28 11:10:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18108 states to 18108 states and 26109 transitions. [2020-10-28 11:10:18,553 INFO L78 Accepts]: Start accepts. Automaton has 18108 states and 26109 transitions. Word has length 1019 [2020-10-28 11:10:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:10:18,553 INFO L481 AbstractCegarLoop]: Abstraction has 18108 states and 26109 transitions. [2020-10-28 11:10:18,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:10:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18108 states and 26109 transitions. [2020-10-28 11:10:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2020-10-28 11:10:18,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:10:18,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:10:18,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:10:18,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:10:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:10:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash 878950967, now seen corresponding path program 1 times [2020-10-28 11:10:18,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:10:18,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182996838] [2020-10-28 11:10:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:10:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:10:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:10:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:10:23,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:10:23,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1044 [2020-10-28 11:10:23,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:10:23,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 11:10:23,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:10:23,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:10:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:10:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:10:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:10:23,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:10:24,215 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:10:24,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:10:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:10:24,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:10:24,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:10:24,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:10:24,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:10:24,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:10:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:10:24,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:10:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:10:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:10:24,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:10:24,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:10:24,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:10:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 11:10:24,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:10:24,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:10:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:10:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:10:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:10:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:10:24,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:10:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:10:24,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:10:24,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:10:24,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 11:10:24,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:10:24,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 11:10:24,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:10:24,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:10:24,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:10:24,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:10:24,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 11:10:24,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:10:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:10:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182996838] [2020-10-28 11:10:25,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:10:25,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:10:25,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395086837] [2020-10-28 11:10:25,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:10:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:10:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:10:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:10:25,161 INFO L87 Difference]: Start difference. First operand 18108 states and 26109 transitions. Second operand 8 states. [2020-10-28 11:10:25,424 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:10:25,833 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:10:28,697 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:10:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:10:56,446 INFO L93 Difference]: Finished difference Result 72674 states and 117183 transitions. [2020-10-28 11:10:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 11:10:56,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1022 [2020-10-28 11:10:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:10:56,690 INFO L225 Difference]: With dead ends: 72674 [2020-10-28 11:10:56,690 INFO L226 Difference]: Without dead ends: 54572 [2020-10-28 11:10:56,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 11:10:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54572 states. [2020-10-28 11:10:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54572 to 54104. [2020-10-28 11:10:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54104 states. [2020-10-28 11:10:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54104 states to 54104 states and 78122 transitions. [2020-10-28 11:10:59,247 INFO L78 Accepts]: Start accepts. Automaton has 54104 states and 78122 transitions. Word has length 1022 [2020-10-28 11:10:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:10:59,247 INFO L481 AbstractCegarLoop]: Abstraction has 54104 states and 78122 transitions. [2020-10-28 11:10:59,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:10:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 54104 states and 78122 transitions. [2020-10-28 11:10:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2020-10-28 11:10:59,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:10:59,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:10:59,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:10:59,434 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:10:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:10:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -690058899, now seen corresponding path program 1 times [2020-10-28 11:10:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:10:59,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923450378] [2020-10-28 11:10:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:10:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:10:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:05,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1056 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:11:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 11:11:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:05,438 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:11:05,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:11:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:05,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:05,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:11:05,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:05,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:11:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:05,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:05,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:11:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:05,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 11:11:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:05,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:05,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:05,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:11:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 11:11:06,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923450378] [2020-10-28 11:11:06,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:11:06,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:11:06,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206001405] [2020-10-28 11:11:06,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:11:06,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:11:06,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:11:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:11:06,643 INFO L87 Difference]: Start difference. First operand 54104 states and 78122 transitions. Second operand 8 states. [2020-10-28 11:11:06,902 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:11:07,514 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:11:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:11:27,139 INFO L93 Difference]: Finished difference Result 110068 states and 172176 transitions. [2020-10-28 11:11:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 11:11:27,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1034 [2020-10-28 11:11:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:11:27,455 INFO L225 Difference]: With dead ends: 110068 [2020-10-28 11:11:27,455 INFO L226 Difference]: Without dead ends: 55970 [2020-10-28 11:11:27,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-28 11:11:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55970 states. [2020-10-28 11:11:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55970 to 55330. [2020-10-28 11:11:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55330 states. [2020-10-28 11:11:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55330 states to 55330 states and 78804 transitions. [2020-10-28 11:11:30,232 INFO L78 Accepts]: Start accepts. Automaton has 55330 states and 78804 transitions. Word has length 1034 [2020-10-28 11:11:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:11:30,238 INFO L481 AbstractCegarLoop]: Abstraction has 55330 states and 78804 transitions. [2020-10-28 11:11:30,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:11:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55330 states and 78804 transitions. [2020-10-28 11:11:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2020-10-28 11:11:30,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:11:30,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:11:30,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 11:11:30,574 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:11:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:11:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2090465385, now seen corresponding path program 1 times [2020-10-28 11:11:30,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:11:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016388363] [2020-10-28 11:11:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:11:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1084 [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:11:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:11:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 11:11:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:36,284 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:11:36,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:11:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:36,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:36,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:11:36,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:11:36,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:11:36,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:36,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:11:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:36,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:36,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:11:36,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 11:11:36,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:36,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:11:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:11:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:11:36,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:36,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 11:11:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:36,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:36,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:11:36,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:11:36,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:36,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 11:11:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:11:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:11:36,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:11:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:11:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 11:11:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:11:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:11:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 50 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 11:11:37,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016388363] [2020-10-28 11:11:37,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:11:37,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:11:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412662749] [2020-10-28 11:11:37,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:11:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:11:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:11:37,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:11:37,347 INFO L87 Difference]: Start difference. First operand 55330 states and 78804 transitions. Second operand 7 states. [2020-10-28 11:11:37,618 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:11:39,345 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 164