/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=SHALLOWEST --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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:10:29,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:10:29,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:10:30,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:10:30,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:10:30,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:10:30,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:10:30,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:10:30,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:10:30,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:10:30,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:10:30,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:10:30,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:10:30,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:10:30,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:10:30,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:10:30,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:10:30,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:10:30,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:10:30,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:10:30,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:10:30,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:10:30,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:10:30,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:10:30,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:10:30,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:10:30,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:10:30,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:10:30,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:10:30,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:10:30,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:10:30,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:10:30,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:10:30,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:10:30,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:10:30,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:10:30,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:10:30,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:10:30,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:10:30,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:10:30,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:10:30,135 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 [2020-10-26 23:10:30,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:10:30,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:10:30,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:10:30,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:10:30,166 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:10:30,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:10:30,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:10:30,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:10:30,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:10:30,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:10:30,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:10:30,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:10:30,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:10:30,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:10:30,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:10:30,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:10:30,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:10:30,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:10:30,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:10:30,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:10:30,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:10:30,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:10:30,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:10:30,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:10:30,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:10:30,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:10:30,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:10:30,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:10:30,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:10:30,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:10:30,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:10:30,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:10:30,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:10:30,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:10:30,712 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:10:30,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label28.c [2020-10-26 23:10:30,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/396735dac/992b99ab232e472481122dcd02045ecd/FLAG5f568b43a [2020-10-26 23:10:32,039 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:10:32,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label28.c [2020-10-26 23:10:32,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/396735dac/992b99ab232e472481122dcd02045ecd/FLAG5f568b43a [2020-10-26 23:10:32,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/396735dac/992b99ab232e472481122dcd02045ecd [2020-10-26 23:10:32,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:10:32,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:10:32,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:10:32,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:10:32,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:10:32,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:10:32" (1/1) ... [2020-10-26 23:10:32,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707175ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:32, skipping insertion in model container [2020-10-26 23:10:32,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:10:32" (1/1) ... [2020-10-26 23:10:32,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:10:32,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:10:34,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:10:34,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:10:35,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:10:35,272 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:10:35,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35 WrapperNode [2020-10-26 23:10:35,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:10:35,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:10:35,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:10:35,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:10:35,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (1/1) ... [2020-10-26 23:10:35,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:10:35,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:10:35,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:10:35,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:10:35,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (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 [2020-10-26 23:10:35,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:10:35,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:10:35,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:10:35,914 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:10:35,914 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:10:35,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:10:35,916 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:10:35,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:10:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:10:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:10:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:10:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:10:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:10:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:10:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:10:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:10:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:10:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:10:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:10:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:10:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:10:35,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:10:35,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:10:35,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:10:35,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:10:46,255 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:10:46,255 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:10:46,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:46 BoogieIcfgContainer [2020-10-26 23:10:46,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:10:46,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:10:46,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:10:46,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:10:46,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:10:32" (1/3) ... [2020-10-26 23:10:46,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2deac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:46, skipping insertion in model container [2020-10-26 23:10:46,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:35" (2/3) ... [2020-10-26 23:10:46,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2deac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:46, skipping insertion in model container [2020-10-26 23:10:46,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:46" (3/3) ... [2020-10-26 23:10:46,281 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label28.c [2020-10-26 23:10:46,296 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:10:46,304 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:10:46,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:10:46,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:10:46,376 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:10:46,377 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:10:46,377 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:10:46,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:10:46,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:10:46,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:10:46,377 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:10:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:10:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 23:10:46,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:46,447 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] [2020-10-26 23:10:46,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash 294988666, now seen corresponding path program 1 times [2020-10-26 23:10:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:46,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856289970] [2020-10-26 23:10:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:47,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:47,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 23:10:47,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-26 23:10:47,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 23:10:47,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:10:47,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:47,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:47,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:47,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:47,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:47,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:10:47,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:47,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:47,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:47,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:47,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:10:47,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856289970] [2020-10-26 23:10:47,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:10:47,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:10:47,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183690697] [2020-10-26 23:10:47,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:10:47,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:10:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:10:47,430 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:10:47,622 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:04,569 INFO L93 Difference]: Finished difference Result 3112 states and 5735 transitions. [2020-10-26 23:11:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:11:04,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 23:11:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:04,626 INFO L225 Difference]: With dead ends: 3112 [2020-10-26 23:11:04,627 INFO L226 Difference]: Without dead ends: 1904 [2020-10-26 23:11:04,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:11:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-26 23:11:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1884. [2020-10-26 23:11:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-26 23:11:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2891 transitions. [2020-10-26 23:11:04,822 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2891 transitions. Word has length 22 [2020-10-26 23:11:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:04,823 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2891 transitions. [2020-10-26 23:11:04,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:11:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2891 transitions. [2020-10-26 23:11:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 23:11:04,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:04,828 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:11:04,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:11:04,829 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1678455906, now seen corresponding path program 1 times [2020-10-26 23:11:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:04,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564244235] [2020-10-26 23:11:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:05,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:05,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 23:11:05,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-26 23:11:05,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:11:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:05,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:05,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:05,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 23:11:05,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:05,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:05,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:05,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:11:05,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:05,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:11:05,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:11:05,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564244235] [2020-10-26 23:11:06,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:06,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:06,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599452592] [2020-10-26 23:11:06,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:06,119 INFO L87 Difference]: Start difference. First operand 1884 states and 2891 transitions. Second operand 7 states. [2020-10-26 23:11:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:38,299 INFO L93 Difference]: Finished difference Result 5565 states and 8577 transitions. [2020-10-26 23:11:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:11:38,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-26 23:11:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:38,325 INFO L225 Difference]: With dead ends: 5565 [2020-10-26 23:11:38,325 INFO L226 Difference]: Without dead ends: 3687 [2020-10-26 23:11:38,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:11:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2020-10-26 23:11:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3551. [2020-10-26 23:11:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3551 states. [2020-10-26 23:11:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5021 transitions. [2020-10-26 23:11:38,457 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5021 transitions. Word has length 91 [2020-10-26 23:11:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:38,457 INFO L481 AbstractCegarLoop]: Abstraction has 3551 states and 5021 transitions. [2020-10-26 23:11:38,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5021 transitions. [2020-10-26 23:11:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 23:11:38,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:38,461 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:11:38,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:11:38,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1038431438, now seen corresponding path program 1 times [2020-10-26 23:11:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:38,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861625369] [2020-10-26 23:11:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:38,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:40,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:40,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 23:11:40,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:11:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-26 23:11:40,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:40,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:40,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:11:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:11:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:40,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:40,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:40,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:40,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:40,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:11:40,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:40,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:11:40,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:40,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:11:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-26 23:11:40,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:11:40,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:40,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861625369] [2020-10-26 23:11:40,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:40,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079912564] [2020-10-26 23:11:40,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:40,909 INFO L87 Difference]: Start difference. First operand 3551 states and 5021 transitions. Second operand 7 states. [2020-10-26 23:12:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:07,696 INFO L93 Difference]: Finished difference Result 8129 states and 11700 transitions. [2020-10-26 23:12:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:12:07,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-26 23:12:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:07,727 INFO L225 Difference]: With dead ends: 8129 [2020-10-26 23:12:07,727 INFO L226 Difference]: Without dead ends: 4584 [2020-10-26 23:12:07,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:12:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2020-10-26 23:12:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4466. [2020-10-26 23:12:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4466 states. [2020-10-26 23:12:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 5746 transitions. [2020-10-26 23:12:07,897 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 5746 transitions. Word has length 99 [2020-10-26 23:12:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:07,897 INFO L481 AbstractCegarLoop]: Abstraction has 4466 states and 5746 transitions. [2020-10-26 23:12:07,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 5746 transitions. [2020-10-26 23:12:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 23:12:07,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:07,912 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:12:07,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:12:07,914 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1097771282, now seen corresponding path program 1 times [2020-10-26 23:12:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:07,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498134456] [2020-10-26 23:12:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:09,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:09,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 23:12:09,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:09,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-26 23:12:09,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 23:12:09,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:09,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:09,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:09,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:09,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:09,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:12:09,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:09,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:09,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:09,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:09,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:09,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:09,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:09,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:12:09,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498134456] [2020-10-26 23:12:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:09,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985904651] [2020-10-26 23:12:09,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:09,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:09,830 INFO L87 Difference]: Start difference. First operand 4466 states and 5746 transitions. Second operand 7 states. [2020-10-26 23:12:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:35,039 INFO L93 Difference]: Finished difference Result 10932 states and 14892 transitions. [2020-10-26 23:12:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:12:35,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-26 23:12:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:35,084 INFO L225 Difference]: With dead ends: 10932 [2020-10-26 23:12:35,085 INFO L226 Difference]: Without dead ends: 7275 [2020-10-26 23:12:35,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:12:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2020-10-26 23:12:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 7134. [2020-10-26 23:12:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7134 states. [2020-10-26 23:12:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 8923 transitions. [2020-10-26 23:12:35,304 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 8923 transitions. Word has length 131 [2020-10-26 23:12:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:35,305 INFO L481 AbstractCegarLoop]: Abstraction has 7134 states and 8923 transitions. [2020-10-26 23:12:35,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 8923 transitions. [2020-10-26 23:12:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 23:12:35,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:35,312 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:35,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:12:35,312 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash -298501670, now seen corresponding path program 1 times [2020-10-26 23:12:35,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:35,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434687765] [2020-10-26 23:12:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:35,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:37,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:37,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-26 23:12:37,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:37,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-26 23:12:37,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:12:37,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:38,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:38,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:38,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:38,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:38,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:12:38,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:38,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:38,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:38,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:38,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:38,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:12:38,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:38,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-26 23:12:38,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:12:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:38,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:12:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:38,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:38,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:38,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:12:38,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:38,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 23:12:38,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:12:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:12:38,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:12:38,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:12:38,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434687765] [2020-10-26 23:12:38,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:12:38,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:12:38,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725968834] [2020-10-26 23:12:38,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:38,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:38,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:38,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:38,924 INFO L87 Difference]: Start difference. First operand 7134 states and 8923 transitions. Second operand 7 states. [2020-10-26 23:13:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:02,360 INFO L93 Difference]: Finished difference Result 13712 states and 17359 transitions. [2020-10-26 23:13:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:13:02,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2020-10-26 23:13:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:02,436 INFO L225 Difference]: With dead ends: 13712 [2020-10-26 23:13:02,436 INFO L226 Difference]: Without dead ends: 7387 [2020-10-26 23:13:02,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:13:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2020-10-26 23:13:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 7190. [2020-10-26 23:13:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7190 states. [2020-10-26 23:13:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 8998 transitions. [2020-10-26 23:13:02,631 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 8998 transitions. Word has length 192 [2020-10-26 23:13:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:02,632 INFO L481 AbstractCegarLoop]: Abstraction has 7190 states and 8998 transitions. [2020-10-26 23:13:02,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 8998 transitions. [2020-10-26 23:13:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 23:13:02,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:02,635 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:02,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:13:02,635 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -738160687, now seen corresponding path program 1 times [2020-10-26 23:13:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:02,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684628503] [2020-10-26 23:13:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:02,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:03,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:03,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 23:13:03,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:03,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-26 23:13:03,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:13:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:13:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:04,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:04,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:13:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:13:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:04,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:04,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:04,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:13:04,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:04,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:13:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:04,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:04,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:04,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:13:04,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:04,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 23:13:04,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:13:04,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:13:04,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684628503] [2020-10-26 23:13:04,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:04,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:13:04,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151460761] [2020-10-26 23:13:04,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:04,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:04,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:04,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:04,701 INFO L87 Difference]: Start difference. First operand 7190 states and 8998 transitions. Second operand 7 states. [2020-10-26 23:13:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:34,812 INFO L93 Difference]: Finished difference Result 17278 states and 22740 transitions. [2020-10-26 23:13:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:13:34,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 199 [2020-10-26 23:13:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:34,856 INFO L225 Difference]: With dead ends: 17278 [2020-10-26 23:13:34,857 INFO L226 Difference]: Without dead ends: 10897 [2020-10-26 23:13:34,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10897 states. [2020-10-26 23:13:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 10661. [2020-10-26 23:13:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10661 states. [2020-10-26 23:13:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10661 states to 10661 states and 13065 transitions. [2020-10-26 23:13:35,181 INFO L78 Accepts]: Start accepts. Automaton has 10661 states and 13065 transitions. Word has length 199 [2020-10-26 23:13:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:35,181 INFO L481 AbstractCegarLoop]: Abstraction has 10661 states and 13065 transitions. [2020-10-26 23:13:35,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10661 states and 13065 transitions. [2020-10-26 23:13:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 23:13:35,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:35,186 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 23:13:35,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:13:35,187 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1451604279, now seen corresponding path program 1 times [2020-10-26 23:13:35,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:35,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727905521] [2020-10-26 23:13:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:35,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:35,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:37,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:37,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-26 23:13:37,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:13:37,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-26 23:13:37,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:37,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:13:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-26 23:13:37,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:37,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:37,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:38,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:38,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:38,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:38,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:38,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:13:38,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:38,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-26 23:13:38,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:13:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:13:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:13:38,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:38,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:38,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:13:39,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727905521] [2020-10-26 23:13:39,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:39,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:13:39,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215534] [2020-10-26 23:13:39,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:13:39,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:13:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:39,649 INFO L87 Difference]: Start difference. First operand 10661 states and 13065 transitions. Second operand 12 states. [2020-10-26 23:13:39,887 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 23:13:40,540 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 23:13:43,446 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-26 23:13:43,781 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-26 23:13:43,933 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-26 23:13:44,331 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-26 23:13:44,763 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-26 23:13:45,107 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-26 23:13:45,900 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-26 23:13:46,848 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-26 23:13:48,178 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-26 23:13:48,539 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-26 23:13:50,216 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-26 23:13:55,517 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-26 23:14:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:23,183 INFO L93 Difference]: Finished difference Result 14350 states and 18792 transitions. [2020-10-26 23:14:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 23:14:23,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 244 [2020-10-26 23:14:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:23,235 INFO L225 Difference]: With dead ends: 14350 [2020-10-26 23:14:23,235 INFO L226 Difference]: Without dead ends: 14347 [2020-10-26 23:14:23,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 23:14:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2020-10-26 23:14:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 13182. [2020-10-26 23:14:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13182 states. [2020-10-26 23:14:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13182 states to 13182 states and 17240 transitions. [2020-10-26 23:14:23,632 INFO L78 Accepts]: Start accepts. Automaton has 13182 states and 17240 transitions. Word has length 244 [2020-10-26 23:14:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:23,633 INFO L481 AbstractCegarLoop]: Abstraction has 13182 states and 17240 transitions. [2020-10-26 23:14:23,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:14:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13182 states and 17240 transitions. [2020-10-26 23:14:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-26 23:14:23,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:23,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:14:23,641 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1370256159, now seen corresponding path program 1 times [2020-10-26 23:14:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084246671] [2020-10-26 23:14:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:24,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:27,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-26 23:14:27,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:14:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3873 [2020-10-26 23:14:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:14:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 23:14:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0