/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:54:02,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:54:02,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:54:02,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:54:02,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:54:02,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:54:02,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:54:02,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:54:02,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:54:02,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:54:02,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:54:02,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:54:02,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:54:02,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:54:02,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:54:02,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:54:02,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:54:02,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:54:02,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:54:02,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:54:02,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:54:02,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:54:02,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:54:02,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:54:02,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:54:02,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:54:02,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:54:02,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:54:02,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:54:02,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:54:02,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:54:02,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:54:02,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:54:02,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:54:02,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:54:02,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:54:02,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:54:02,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:54:02,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:54:02,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:54:02,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:54:02,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 17:54:02,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:54:02,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:54:02,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:54:02,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:54:02,467 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:54:02,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:54:02,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:54:02,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:54:02,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:54:02,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:54:02,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:54:02,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:54:02,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:54:02,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:54:02,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:54:02,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:54:02,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:54:02,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:54:02,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:54:02,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:54:02,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:54:02,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:54:02,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:54:02,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:54:02,966 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:54:02,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-27 17:54:03,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b10d614d/b7c7a9f6d36d42d894f2e16af5271312/FLAG58a1ae56c [2020-10-27 17:54:04,226 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:54:04,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-27 17:54:04,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b10d614d/b7c7a9f6d36d42d894f2e16af5271312/FLAG58a1ae56c [2020-10-27 17:54:04,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b10d614d/b7c7a9f6d36d42d894f2e16af5271312 [2020-10-27 17:54:04,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:54:04,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:54:04,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:54:04,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:54:04,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:54:04,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:04" (1/1) ... [2020-10-27 17:54:04,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d0e864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:04, skipping insertion in model container [2020-10-27 17:54:04,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:04" (1/1) ... [2020-10-27 17:54:04,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:54:04,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:54:06,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:54:06,631 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:54:07,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:54:07,528 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:54:07,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07 WrapperNode [2020-10-27 17:54:07,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:54:07,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:54:07,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:54:07,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:54:07,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:07,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:07,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:07,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:08,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:08,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:08,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... [2020-10-27 17:54:08,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:54:08,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:54:08,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:54:08,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:54:08,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:54:08,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:54:08,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:54:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:54:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:54:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:54:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:54:08,362 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:54:08,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:54:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:54:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:54:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:54:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:54:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:54:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:54:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:54:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:54:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:54:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:54:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:54:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:54:19,768 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:54:19,769 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:54:19,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:19 BoogieIcfgContainer [2020-10-27 17:54:19,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:54:19,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:54:19,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:54:19,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:54:19,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:54:04" (1/3) ... [2020-10-27 17:54:19,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f606fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:19, skipping insertion in model container [2020-10-27 17:54:19,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:07" (2/3) ... [2020-10-27 17:54:19,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f606fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:19, skipping insertion in model container [2020-10-27 17:54:19,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:19" (3/3) ... [2020-10-27 17:54:19,795 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label06.c [2020-10-27 17:54:19,813 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:54:19,823 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:54:19,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:54:19,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:54:19,905 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:54:19,906 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:54:19,906 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:54:19,906 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:54:19,906 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:54:19,906 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:54:19,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:54:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:54:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 17:54:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:54:19,987 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] [2020-10-27 17:54:19,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:54:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:54:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash -452148062, now seen corresponding path program 1 times [2020-10-27 17:54:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:54:20,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565084227] [2020-10-27 17:54:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:54:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:21,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:21,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 17:54:21,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:21,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-27 17:54:21,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:54:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:54:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 17:54:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:54:21,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:54:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:21,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:21,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:54:21,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:21,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 17:54:21,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:54:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:54:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:54:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565084227] [2020-10-27 17:54:21,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:54:21,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 17:54:21,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049973386] [2020-10-27 17:54:21,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 17:54:21,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:54:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 17:54:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 17:54:21,392 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 17:54:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:54:37,412 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-27 17:54:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:54:37,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 17:54:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:54:37,459 INFO L225 Difference]: With dead ends: 3157 [2020-10-27 17:54:37,460 INFO L226 Difference]: Without dead ends: 1955 [2020-10-27 17:54:37,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:54:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-27 17:54:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-27 17:54:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-27 17:54:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-27 17:54:37,724 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 32 [2020-10-27 17:54:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:54:37,726 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-27 17:54:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 17:54:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-27 17:54:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 17:54:37,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:54:37,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:54:37,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:54:37,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:54:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:54:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 922615984, now seen corresponding path program 1 times [2020-10-27 17:54:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:54:37,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207301421] [2020-10-27 17:54:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:54:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:38,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 17:54:39,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:54:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1636 [2020-10-27 17:54:39,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:54:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 17:54:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 17:54:39,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:54:39,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:54:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:39,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:39,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:54:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:54:39,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:54:39,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:39,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:54:39,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:54:39,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:54:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:39,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:39,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:39,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 17:54:39,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:39,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 17:54:39,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:54:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 17:54:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:54:39,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207301421] [2020-10-27 17:54:39,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:54:39,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:54:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572952116] [2020-10-27 17:54:39,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:54:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:54:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:54:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:54:39,850 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 5 states. [2020-10-27 17:55:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:01,878 INFO L93 Difference]: Finished difference Result 5553 states and 9195 transitions. [2020-10-27 17:55:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:01,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-27 17:55:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:01,910 INFO L225 Difference]: With dead ends: 5553 [2020-10-27 17:55:01,910 INFO L226 Difference]: Without dead ends: 3673 [2020-10-27 17:55:01,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2020-10-27 17:55:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3653. [2020-10-27 17:55:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3653 states. [2020-10-27 17:55:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 5525 transitions. [2020-10-27 17:55:02,050 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 5525 transitions. Word has length 102 [2020-10-27 17:55:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:02,051 INFO L481 AbstractCegarLoop]: Abstraction has 3653 states and 5525 transitions. [2020-10-27 17:55:02,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:55:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 5525 transitions. [2020-10-27 17:55:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 17:55:02,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:02,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:02,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:55:02,063 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash 291905914, now seen corresponding path program 1 times [2020-10-27 17:55:02,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:02,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248755085] [2020-10-27 17:55:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:02,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:03,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:03,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 17:55:03,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:55:03,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-27 17:55:03,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:03,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:03,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 17:55:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 17:55:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:03,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:03,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:03,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:03,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:03,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:03,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:55:03,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:03,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:03,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:03,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:03,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:03,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:03,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:03,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:55:03,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 17:55:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:03,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248755085] [2020-10-27 17:55:03,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:03,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:55:03,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603530360] [2020-10-27 17:55:03,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:55:03,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:55:03,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:03,634 INFO L87 Difference]: Start difference. First operand 3653 states and 5525 transitions. Second operand 5 states. [2020-10-27 17:55:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:26,256 INFO L93 Difference]: Finished difference Result 7480 states and 11957 transitions. [2020-10-27 17:55:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:26,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 17:55:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:26,295 INFO L225 Difference]: With dead ends: 7480 [2020-10-27 17:55:26,295 INFO L226 Difference]: Without dead ends: 5476 [2020-10-27 17:55:26,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2020-10-27 17:55:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 5363. [2020-10-27 17:55:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5363 states. [2020-10-27 17:55:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 8367 transitions. [2020-10-27 17:55:26,493 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 8367 transitions. Word has length 107 [2020-10-27 17:55:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:26,494 INFO L481 AbstractCegarLoop]: Abstraction has 5363 states and 8367 transitions. [2020-10-27 17:55:26,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:55:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 8367 transitions. [2020-10-27 17:55:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 17:55:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:26,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:26,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:55:26,497 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -686904224, now seen corresponding path program 1 times [2020-10-27 17:55:26,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:26,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362600656] [2020-10-27 17:55:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:26,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:27,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:27,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 17:55:27,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:55:27,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-27 17:55:27,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:27,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-27 17:55:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 17:55:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:27,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:27,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:27,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:27,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:55:27,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:27,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:27,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:27,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:27,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:27,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:27,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 17:55:27,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 17:55:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:28,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362600656] [2020-10-27 17:55:28,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:28,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:55:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368566716] [2020-10-27 17:55:28,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:55:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:55:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:28,044 INFO L87 Difference]: Start difference. First operand 5363 states and 8367 transitions. Second operand 5 states. [2020-10-27 17:55:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:47,692 INFO L93 Difference]: Finished difference Result 10895 states and 17657 transitions. [2020-10-27 17:55:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:47,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-10-27 17:55:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:47,739 INFO L225 Difference]: With dead ends: 10895 [2020-10-27 17:55:47,740 INFO L226 Difference]: Without dead ends: 7177 [2020-10-27 17:55:47,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2020-10-27 17:55:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 7068. [2020-10-27 17:55:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7068 states. [2020-10-27 17:55:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 11246 transitions. [2020-10-27 17:55:47,980 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 11246 transitions. Word has length 144 [2020-10-27 17:55:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:47,982 INFO L481 AbstractCegarLoop]: Abstraction has 7068 states and 11246 transitions. [2020-10-27 17:55:47,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:55:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 11246 transitions. [2020-10-27 17:55:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 17:55:47,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:47,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:47,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:55:47,993 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1418046110, now seen corresponding path program 1 times [2020-10-27 17:55:47,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:47,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320010843] [2020-10-27 17:55:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:48,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:48,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:48,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:49,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:49,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 17:55:49,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:55:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1880 [2020-10-27 17:55:49,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 17:55:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:55:49,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:50,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:50,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:50,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:50,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:50,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:50,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:50,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:50,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 17:55:50,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:50,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 17:55:50,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 17:55:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:50,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320010843] [2020-10-27 17:55:50,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:50,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:55:50,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87651052] [2020-10-27 17:55:50,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:55:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:55:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:50,428 INFO L87 Difference]: Start difference. First operand 7068 states and 11246 transitions. Second operand 5 states. [2020-10-27 17:56:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:15,551 INFO L93 Difference]: Finished difference Result 20672 states and 33600 transitions. [2020-10-27 17:56:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:56:15,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-27 17:56:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:15,623 INFO L225 Difference]: With dead ends: 20672 [2020-10-27 17:56:15,623 INFO L226 Difference]: Without dead ends: 13610 [2020-10-27 17:56:15,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2020-10-27 17:56:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 13585. [2020-10-27 17:56:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13585 states. [2020-10-27 17:56:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13585 states to 13585 states and 19888 transitions. [2020-10-27 17:56:16,030 INFO L78 Accepts]: Start accepts. Automaton has 13585 states and 19888 transitions. Word has length 168 [2020-10-27 17:56:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:16,031 INFO L481 AbstractCegarLoop]: Abstraction has 13585 states and 19888 transitions. [2020-10-27 17:56:16,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:56:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 13585 states and 19888 transitions. [2020-10-27 17:56:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 17:56:16,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:16,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:56:16,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:56:16,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -716446236, now seen corresponding path program 1 times [2020-10-27 17:56:16,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:16,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57579998] [2020-10-27 17:56:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:16,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:16,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:16,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 17:56:16,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:56:16,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:17,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:17,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:17,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:56:17,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:17,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:17,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:17,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:17,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:17,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 17:56:17,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:56:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:56:17,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57579998] [2020-10-27 17:56:17,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:17,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:56:17,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011837077] [2020-10-27 17:56:17,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:56:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:56:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:17,507 INFO L87 Difference]: Start difference. First operand 13585 states and 19888 transitions. Second operand 6 states. [2020-10-27 17:56:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:34,179 INFO L93 Difference]: Finished difference Result 23895 states and 35637 transitions. [2020-10-27 17:56:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:56:34,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2020-10-27 17:56:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:34,240 INFO L225 Difference]: With dead ends: 23895 [2020-10-27 17:56:34,241 INFO L226 Difference]: Without dead ends: 13577 [2020-10-27 17:56:34,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:56:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13577 states. [2020-10-27 17:56:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13577 to 13572. [2020-10-27 17:56:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13572 states. [2020-10-27 17:56:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13572 states to 13572 states and 19861 transitions. [2020-10-27 17:56:34,624 INFO L78 Accepts]: Start accepts. Automaton has 13572 states and 19861 transitions. Word has length 168 [2020-10-27 17:56:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:34,625 INFO L481 AbstractCegarLoop]: Abstraction has 13572 states and 19861 transitions. [2020-10-27 17:56:34,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:56:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13572 states and 19861 transitions. [2020-10-27 17:56:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 17:56:34,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:34,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:56:34,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:56:34,629 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 388293321, now seen corresponding path program 1 times [2020-10-27 17:56:34,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:34,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706672395] [2020-10-27 17:56:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:35,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:36,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:36,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 17:56:36,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:56:36,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-27 17:56:36,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:36,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:56:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-27 17:56:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 17:56:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:36,393 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:56:36,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:36,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:36,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:36,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 17:56:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:36,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:36,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:56:36,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:36,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:36,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 17:56:36,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:36,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 17:56:36,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:36,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:36,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 17:56:36,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:56:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:56:36,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706672395] [2020-10-27 17:56:36,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:36,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:56:36,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94631657] [2020-10-27 17:56:36,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:56:36,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:56:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:56:36,929 INFO L87 Difference]: Start difference. First operand 13572 states and 19861 transitions. Second operand 5 states. [2020-10-27 17:56:37,084 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:57:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:57:03,261 INFO L93 Difference]: Finished difference Result 33685 states and 51282 transitions. [2020-10-27 17:57:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:57:03,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-27 17:57:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:57:03,352 INFO L225 Difference]: With dead ends: 33685 [2020-10-27 17:57:03,352 INFO L226 Difference]: Without dead ends: 20119 [2020-10-27 17:57:03,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:57:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2020-10-27 17:57:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 20081. [2020-10-27 17:57:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20081 states. [2020-10-27 17:57:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 28056 transitions. [2020-10-27 17:57:03,909 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 28056 transitions. Word has length 169 [2020-10-27 17:57:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:57:03,910 INFO L481 AbstractCegarLoop]: Abstraction has 20081 states and 28056 transitions. [2020-10-27 17:57:03,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:57:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 28056 transitions. [2020-10-27 17:57:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-27 17:57:03,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:57:03,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:57:03,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 17:57:03,919 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:57:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:57:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1623073595, now seen corresponding path program 1 times [2020-10-27 17:57:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:57:03,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483508507] [2020-10-27 17:57:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:57:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:04,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:04,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:07,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:07,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 17:57:07,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 17:57:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3655 [2020-10-27 17:57:07,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:57:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 230 [2020-10-27 17:57:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:57:07,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:57:07,863 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:57:07,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:07,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:07,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:07,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:07,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:07,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:57:07,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:07,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:07,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:57:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:07,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:07,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:07,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 17:57:07,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:07,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 17:57:07,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:07,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:07,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:08,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-27 17:57:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:08,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:08,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:08,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 17:57:08,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:57:08,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 17:57:08,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 17:57:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:57:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:57:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 17:57:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483508507] [2020-10-27 17:57:08,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:57:08,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:57:08,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266072933] [2020-10-27 17:57:08,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:57:08,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:57:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:57:08,480 INFO L87 Difference]: Start difference. First operand 20081 states and 28056 transitions. Second operand 6 states.