/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:00:32,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:00:32,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:00:32,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:00:32,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:00:32,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:00:32,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:00:32,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:00:32,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:00:32,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:00:32,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:00:32,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:00:32,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:00:32,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:00:32,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:00:32,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:00:32,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:00:32,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:00:32,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:00:32,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:00:32,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:00:32,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:00:32,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:00:32,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:00:32,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:00:32,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:00:32,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:00:32,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:00:32,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:00:32,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:00:32,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:00:32,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:00:32,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:00:32,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:00:32,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:00:32,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:00:32,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:00:32,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:00:32,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:00:32,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:00:32,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:00:32,319 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 11:00:32,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:00:32,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:00:32,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:00:32,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:00:32,376 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:00:32,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:00:32,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:00:32,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:00:32,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:00:32,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:00:32,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:00:32,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:00:32,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:00:32,378 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:00:32,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:00:32,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:00:32,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:00:32,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:00:32,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:00:32,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:00:32,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:00:32,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:00:32,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:00:32,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:00:32,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:00:32,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:00:32,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:00:32,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:00:32,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:00:32,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:00:32,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:00:32,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:00:32,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:00:32,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:00:32,844 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:00:32,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label24.c [2020-10-28 11:00:32,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87227a00e/1d16a16ea8b24cc78f3e2250132f0e69/FLAGbbf7f4ed3 [2020-10-28 11:00:34,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:00:34,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label24.c [2020-10-28 11:00:34,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87227a00e/1d16a16ea8b24cc78f3e2250132f0e69/FLAGbbf7f4ed3 [2020-10-28 11:00:34,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87227a00e/1d16a16ea8b24cc78f3e2250132f0e69 [2020-10-28 11:00:34,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:00:34,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:00:34,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:00:34,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:00:34,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:00:34,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:00:34" (1/1) ... [2020-10-28 11:00:34,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1124215d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:34, skipping insertion in model container [2020-10-28 11:00:34,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:00:34" (1/1) ... [2020-10-28 11:00:34,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:00:34,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:00:36,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:00:36,804 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:00:37,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:00:37,946 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:00:37,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37 WrapperNode [2020-10-28 11:00:37,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:00:37,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:00:37,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:00:37,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:00:37,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:37,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (1/1) ... [2020-10-28 11:00:38,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:00:38,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:00:38,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:00:38,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:00:38,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (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 11:00:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:00:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:00:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:00:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:00:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:00:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:00:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:00:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:00:38,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:00:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:00:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:00:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:00:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:00:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:00:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:00:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:00:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:00:47,325 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:00:47,326 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:00:47,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:00:47 BoogieIcfgContainer [2020-10-28 11:00:47,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:00:47,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:00:47,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:00:47,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:00:47,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:00:34" (1/3) ... [2020-10-28 11:00:47,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3f78ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:00:47, skipping insertion in model container [2020-10-28 11:00:47,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:00:37" (2/3) ... [2020-10-28 11:00:47,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3f78ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:00:47, skipping insertion in model container [2020-10-28 11:00:47,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:00:47" (3/3) ... [2020-10-28 11:00:47,343 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label24.c [2020-10-28 11:00:47,357 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:00:47,363 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:00:47,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:00:47,427 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:00:47,427 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:00:47,427 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:00:47,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:00:47,428 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:00:47,428 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:00:47,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:00:47,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:00:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:00:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2020-10-28 11:00:47,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:00:47,572 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] [2020-10-28 11:00:47,573 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:00:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:00:47,580 INFO L82 PathProgramCache]: Analyzing trace with hash -443278744, now seen corresponding path program 1 times [2020-10-28 11:00:47,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:00:47,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815790510] [2020-10-28 11:00:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:00:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:51,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:54,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:54,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 986 [2020-10-28 11:00:54,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:00:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-28 11:00:54,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:54,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:00:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:00:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 977 [2020-10-28 11:00:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 11:00:55,830 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:00:55,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:00:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:55,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:55,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:55,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:00:55,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 11:00:55,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:55,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:00:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:00:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:00:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:00:57,319 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 11:00:57,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815790510] [2020-10-28 11:00:57,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:00:57,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 11:00:57,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488167851] [2020-10-28 11:00:57,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 11:00:57,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:00:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 11:00:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:00:57,347 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 5 states. [2020-10-28 11:00:57,670 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:01:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:01:15,919 INFO L93 Difference]: Finished difference Result 3772 states and 7046 transitions. [2020-10-28 11:01:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:01:15,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 968 [2020-10-28 11:01:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:01:15,964 INFO L225 Difference]: With dead ends: 3772 [2020-10-28 11:01:15,964 INFO L226 Difference]: Without dead ends: 2389 [2020-10-28 11:01:15,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 11:01:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2020-10-28 11:01:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2333. [2020-10-28 11:01:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2333 states. [2020-10-28 11:01:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 4232 transitions. [2020-10-28 11:01:16,159 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 4232 transitions. Word has length 968 [2020-10-28 11:01:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:16,162 INFO L481 AbstractCegarLoop]: Abstraction has 2333 states and 4232 transitions. [2020-10-28 11:01:16,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 11:01:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 4232 transitions. [2020-10-28 11:01:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-10-28 11:01:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:16,204 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] [2020-10-28 11:01:16,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:01:16,205 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash 236748577, now seen corresponding path program 1 times [2020-10-28 11:01:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:16,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781968] [2020-10-28 11:01:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:21,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:21,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1000 [2020-10-28 11:01:21,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:01:21,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5271 [2020-10-28 11:01:21,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:21,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:01:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:01:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:01:21,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:22,104 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:22,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:22,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:22,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:22,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:22,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:22,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 11:01:22,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:22,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:01:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:22,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:22,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:22,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:22,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:01:22,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:22,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 11:01:22,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:22,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:01:22,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:01:22,912 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 11:01:22,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781968] [2020-10-28 11:01:22,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:01:22,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:01:22,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798440857] [2020-10-28 11:01:22,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:22,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:22,917 INFO L87 Difference]: Start difference. First operand 2333 states and 4232 transitions. Second operand 7 states. [2020-10-28 11:01:23,193 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:01:24,207 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 11:01:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:01:44,398 INFO L93 Difference]: Finished difference Result 6938 states and 12677 transitions. [2020-10-28 11:01:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:01:44,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 980 [2020-10-28 11:01:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:01:44,426 INFO L225 Difference]: With dead ends: 6938 [2020-10-28 11:01:44,426 INFO L226 Difference]: Without dead ends: 4611 [2020-10-28 11:01:44,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:01:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2020-10-28 11:01:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 4494. [2020-10-28 11:01:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4494 states. [2020-10-28 11:01:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4494 states to 4494 states and 7153 transitions. [2020-10-28 11:01:44,589 INFO L78 Accepts]: Start accepts. Automaton has 4494 states and 7153 transitions. Word has length 980 [2020-10-28 11:01:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:44,589 INFO L481 AbstractCegarLoop]: Abstraction has 4494 states and 7153 transitions. [2020-10-28 11:01:44,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:01:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4494 states and 7153 transitions. [2020-10-28 11:01:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2020-10-28 11:01:44,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:44,614 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] [2020-10-28 11:01:44,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:01:44,615 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash 672446242, now seen corresponding path program 1 times [2020-10-28 11:01:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167720427] [2020-10-28 11:01:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:44,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:49,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:49,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1010 [2020-10-28 11:01:49,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:01:49,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 11:01:49,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:49,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:01:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:01:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:50,181 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:50,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:50,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:50,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:50,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:50,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:01:50,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:50,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:50,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:50,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:50,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:50,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:01:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:01:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:50,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:01:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:50,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:50,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:01:50,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:50,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 11:01:50,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:50,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:01:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:50,938 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 11:01:50,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167720427] [2020-10-28 11:01:50,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:01:50,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:01:50,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531419140] [2020-10-28 11:01:50,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:50,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:50,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:50,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:50,947 INFO L87 Difference]: Start difference. First operand 4494 states and 7153 transitions. Second operand 7 states. [2020-10-28 11:01:51,387 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:01:51,923 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:02:28,656 INFO L93 Difference]: Finished difference Result 18111 states and 29741 transitions. [2020-10-28 11:02:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:02:28,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 988 [2020-10-28 11:02:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:02:28,743 INFO L225 Difference]: With dead ends: 18111 [2020-10-28 11:02:28,744 INFO L226 Difference]: Without dead ends: 13623 [2020-10-28 11:02:28,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:02:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13623 states. [2020-10-28 11:02:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13623 to 13555. [2020-10-28 11:02:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13555 states. [2020-10-28 11:02:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13555 states to 13555 states and 21557 transitions. [2020-10-28 11:02:29,213 INFO L78 Accepts]: Start accepts. Automaton has 13555 states and 21557 transitions. Word has length 988 [2020-10-28 11:02:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:02:29,214 INFO L481 AbstractCegarLoop]: Abstraction has 13555 states and 21557 transitions. [2020-10-28 11:02:29,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:02:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13555 states and 21557 transitions. [2020-10-28 11:02:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2020-10-28 11:02:29,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:02:29,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:29,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:02:29,276 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:02:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:02:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1048656781, now seen corresponding path program 1 times [2020-10-28 11:02:29,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:02:29,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274029020] [2020-10-28 11:02:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:02:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:29,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:34,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:34,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1017 [2020-10-28 11:02:34,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:02:34,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 11:02:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:34,987 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:02:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:02:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:35,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:02:35,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:35,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:02:35,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:35,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:02:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:35,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:02:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:02:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:35,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:02:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:35,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:35,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:35,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 11:02:35,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:35,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:02:35,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:02:35,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274029020] [2020-10-28 11:02:35,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:02:35,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:02:35,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235816730] [2020-10-28 11:02:35,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:02:35,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:02:35,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:02:35,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:02:35,985 INFO L87 Difference]: Start difference. First operand 13555 states and 21557 transitions. Second operand 7 states. [2020-10-28 11:02:36,354 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:02:36,978 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:03:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:03:16,068 INFO L93 Difference]: Finished difference Result 54009 states and 92635 transitions. [2020-10-28 11:03:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:03:16,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 995 [2020-10-28 11:03:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:03:16,331 INFO L225 Difference]: With dead ends: 54009 [2020-10-28 11:03:16,332 INFO L226 Difference]: Without dead ends: 40460 [2020-10-28 11:03:16,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:03:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40460 states. [2020-10-28 11:03:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40460 to 40368. [2020-10-28 11:03:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40368 states. [2020-10-28 11:03:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40368 states to 40368 states and 65164 transitions. [2020-10-28 11:03:18,040 INFO L78 Accepts]: Start accepts. Automaton has 40368 states and 65164 transitions. Word has length 995 [2020-10-28 11:03:18,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:03:18,041 INFO L481 AbstractCegarLoop]: Abstraction has 40368 states and 65164 transitions. [2020-10-28 11:03:18,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:03:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40368 states and 65164 transitions. [2020-10-28 11:03:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-10-28 11:03:18,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:18,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:18,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:03:18,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash -900620733, now seen corresponding path program 1 times [2020-10-28 11:03:18,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:18,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035466428] [2020-10-28 11:03:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:18,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:23,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:23,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1022 [2020-10-28 11:03:23,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:03:23,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:03:23,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:23,954 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:23,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:23,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:23,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:23,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:23,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:23,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:03:23,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:23,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:03:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:24,109 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:03:24,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:03:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:24,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:24,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:03:24,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:24,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 11:03:24,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:24,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:24,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:24,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:24,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 11:03:24,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:03:24,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 11:03:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:24,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:24,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:03:24,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:24,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 11:03:24,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:24,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:03:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 11:03:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:03:24,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 11:03:25,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035466428] [2020-10-28 11:03:25,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:03:25,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:03:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879675334] [2020-10-28 11:03:25,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:03:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:03:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:03:25,089 INFO L87 Difference]: Start difference. First operand 40368 states and 65164 transitions. Second operand 7 states. [2020-10-28 11:03:25,363 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:03:26,915 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:03:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:03:47,095 INFO L93 Difference]: Finished difference Result 124207 states and 232142 transitions. [2020-10-28 11:03:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:03:47,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1000 [2020-10-28 11:03:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:03:47,829 INFO L225 Difference]: With dead ends: 124207 [2020-10-28 11:03:47,829 INFO L226 Difference]: Without dead ends: 83845 [2020-10-28 11:03:47,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:03:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83845 states. [2020-10-28 11:03:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83845 to 82715. [2020-10-28 11:03:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82715 states. [2020-10-28 11:03:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82715 states to 82715 states and 139888 transitions. [2020-10-28 11:03:52,452 INFO L78 Accepts]: Start accepts. Automaton has 82715 states and 139888 transitions. Word has length 1000 [2020-10-28 11:03:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:03:52,453 INFO L481 AbstractCegarLoop]: Abstraction has 82715 states and 139888 transitions. [2020-10-28 11:03:52,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:03:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 82715 states and 139888 transitions. [2020-10-28 11:03:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2020-10-28 11:03:53,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:53,032 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:53,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:03:53,033 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 149172841, now seen corresponding path program 1 times [2020-10-28 11:03:53,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:53,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63826635] [2020-10-28 11:03:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:53,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:58,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1061 [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 11:03:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 11:03:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:59,014 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:59,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:59,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:59,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:59,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:59,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:03:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:03:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:59,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:59,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:03:59,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:59,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 11:03:59,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:59,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:03:59,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:59,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 11:03:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:59,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:59,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:59,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 11:03:59,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:59,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 11:03:59,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:59,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:59,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:59,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:59,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 11:03:59,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:03:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63826635] [2020-10-28 11:03:59,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:03:59,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:03:59,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043563718] [2020-10-28 11:03:59,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:03:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:03:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:03:59,966 INFO L87 Difference]: Start difference. First operand 82715 states and 139888 transitions. Second operand 7 states. [2020-10-28 11:04:00,275 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:04:00,978 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159