/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/Problem04_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:36:59,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:36:59,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:36:59,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:36:59,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:36:59,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:36:59,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:36:59,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:36:59,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:36:59,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:36:59,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:36:59,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:36:59,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:36:59,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:36:59,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:36:59,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:36:59,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:36:59,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:36:59,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:36:59,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:36:59,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:36:59,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:36:59,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:36:59,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:36:59,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:36:59,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:36:59,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:36:59,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:36:59,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:36:59,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:36:59,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:36:59,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:36:59,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:36:59,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:36:59,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:36:59,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:36:59,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:36:59,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:36:59,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:36:59,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:36:59,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:36:59,466 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 10:36:59,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:36:59,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:36:59,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:36:59,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:36:59,495 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:36:59,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:36:59,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:36:59,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:36:59,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:36:59,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:36:59,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:36:59,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:36:59,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:36:59,497 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:36:59,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:36:59,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:36:59,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:36:59,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:36:59,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:36:59,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:36:59,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:36:59,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:36:59,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:36:59,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:36:59,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:36:59,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:36:59,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:36:59,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:36:59,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:36:59,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:36:59,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:36:59,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:36:59,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:36:59,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:36:59,955 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:36:59,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label56.c [2020-10-28 10:37:00,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8060b355/7d3846bcdab54d6fbb26631b8acb5e76/FLAGea68a02bd [2020-10-28 10:37:01,111 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:37:01,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label56.c [2020-10-28 10:37:01,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8060b355/7d3846bcdab54d6fbb26631b8acb5e76/FLAGea68a02bd [2020-10-28 10:37:01,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8060b355/7d3846bcdab54d6fbb26631b8acb5e76 [2020-10-28 10:37:01,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:37:01,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:37:01,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:37:01,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:37:01,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:37:01,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:37:01" (1/1) ... [2020-10-28 10:37:01,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fac4a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:01, skipping insertion in model container [2020-10-28 10:37:01,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:37:01" (1/1) ... [2020-10-28 10:37:01,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:37:01,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:37:03,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:37:03,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:37:03,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:37:03,897 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:37:03,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03 WrapperNode [2020-10-28 10:37:03,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:37:03,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:37:03,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:37:03,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:37:03,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:03,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:03,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:03,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:04,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:04,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:04,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (1/1) ... [2020-10-28 10:37:04,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:37:04,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:37:04,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:37:04,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:37:04,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (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 10:37:04,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:37:04,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:37:04,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:37:04,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:37:04,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:37:04,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:37:04,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:37:04,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:37:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:37:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:37:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:37:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:37:04,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:37:04,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:37:09,046 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:37:09,047 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:37:09,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:37:09 BoogieIcfgContainer [2020-10-28 10:37:09,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:37:09,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:37:09,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:37:09,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:37:09,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:37:01" (1/3) ... [2020-10-28 10:37:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3a9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:37:09, skipping insertion in model container [2020-10-28 10:37:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:37:03" (2/3) ... [2020-10-28 10:37:09,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3a9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:37:09, skipping insertion in model container [2020-10-28 10:37:09,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:37:09" (3/3) ... [2020-10-28 10:37:09,065 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label56.c [2020-10-28 10:37:09,078 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:37:09,088 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:37:09,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:37:09,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:37:09,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:37:09,150 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:37:09,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:37:09,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:37:09,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:37:09,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:37:09,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:37:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-28 10:37:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2020-10-28 10:37:09,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:09,271 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] [2020-10-28 10:37:09,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash 578935168, now seen corresponding path program 1 times [2020-10-28 10:37:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:09,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551831747] [2020-10-28 10:37:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:15,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:15,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 829 [2020-10-28 10:37:15,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5185 [2020-10-28 10:37:15,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:15,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 10:37:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 820 [2020-10-28 10:37:15,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 10:37:16,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:16,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:16,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:16,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:16,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:16,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:37:16,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:16,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:37:17,341 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 10:37:17,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551831747] [2020-10-28 10:37:17,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:17,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:37:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603182171] [2020-10-28 10:37:17,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:37:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:37:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:37:17,383 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-28 10:37:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:37:29,100 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-28 10:37:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:37:29,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 813 [2020-10-28 10:37:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:37:29,156 INFO L225 Difference]: With dead ends: 2677 [2020-10-28 10:37:29,156 INFO L226 Difference]: Without dead ends: 1703 [2020-10-28 10:37:29,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:37:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-28 10:37:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-28 10:37:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-28 10:37:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2974 transitions. [2020-10-28 10:37:29,419 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2974 transitions. Word has length 813 [2020-10-28 10:37:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:37:29,423 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 2974 transitions. [2020-10-28 10:37:29,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:37:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2974 transitions. [2020-10-28 10:37:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-10-28 10:37:29,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:29,460 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 10:37:29,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:37:29,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 71011579, now seen corresponding path program 1 times [2020-10-28 10:37:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:29,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392512058] [2020-10-28 10:37:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:34,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:34,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 840 [2020-10-28 10:37:34,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:37:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-28 10:37:34,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:34,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:34,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:37:34,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:37:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 10:37:35,161 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:37:35,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:35,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:35,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:35,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:37:35,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:35,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 10:37:35,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:37:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:35,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:35,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:35,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:37:35,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 10:37:35,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:35,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:37:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:37:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:37:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:37:35,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392512058] [2020-10-28 10:37:35,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:35,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:37:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383477117] [2020-10-28 10:37:35,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:37:35,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:37:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:37:35,954 INFO L87 Difference]: Start difference. First operand 1688 states and 2974 transitions. Second operand 7 states. [2020-10-28 10:37:36,101 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:37:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:37:48,502 INFO L93 Difference]: Finished difference Result 5151 states and 9111 transitions. [2020-10-28 10:37:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:37:48,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 822 [2020-10-28 10:37:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:37:48,528 INFO L225 Difference]: With dead ends: 5151 [2020-10-28 10:37:48,529 INFO L226 Difference]: Without dead ends: 3469 [2020-10-28 10:37:48,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:37:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2020-10-28 10:37:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3418. [2020-10-28 10:37:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3418 states. [2020-10-28 10:37:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 5277 transitions. [2020-10-28 10:37:48,715 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 5277 transitions. Word has length 822 [2020-10-28 10:37:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:37:48,716 INFO L481 AbstractCegarLoop]: Abstraction has 3418 states and 5277 transitions. [2020-10-28 10:37:48,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:37:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 5277 transitions. [2020-10-28 10:37:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-10-28 10:37:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:48,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:37:48,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:37:48,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:48,739 INFO L82 PathProgramCache]: Analyzing trace with hash -987326302, now seen corresponding path program 1 times [2020-10-28 10:37:48,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:48,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415921395] [2020-10-28 10:37:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:54,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:54,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 857 [2020-10-28 10:37:54,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:37:54,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 10:37:54,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:54,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 10:37:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 848 [2020-10-28 10:37:54,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:54,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:54,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:54,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:54,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:54,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:54,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:54,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:37:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:54,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:37:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:37:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:37:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 10:37:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415921395] [2020-10-28 10:37:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:37:55,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:37:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856829227] [2020-10-28 10:37:55,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:37:55,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:37:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:37:55,689 INFO L87 Difference]: Start difference. First operand 3418 states and 5277 transitions. Second operand 5 states. [2020-10-28 10:38:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:06,670 INFO L93 Difference]: Finished difference Result 10260 states and 16077 transitions. [2020-10-28 10:38:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:38:06,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 839 [2020-10-28 10:38:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:06,719 INFO L225 Difference]: With dead ends: 10260 [2020-10-28 10:38:06,719 INFO L226 Difference]: Without dead ends: 6848 [2020-10-28 10:38:06,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:38:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2020-10-28 10:38:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6844. [2020-10-28 10:38:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6844 states. [2020-10-28 10:38:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 9691 transitions. [2020-10-28 10:38:06,960 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 9691 transitions. Word has length 839 [2020-10-28 10:38:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:06,963 INFO L481 AbstractCegarLoop]: Abstraction has 6844 states and 9691 transitions. [2020-10-28 10:38:06,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:38:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 9691 transitions. [2020-10-28 10:38:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2020-10-28 10:38:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:06,994 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, 2, 2, 2, 2, 2, 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] [2020-10-28 10:38:06,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:38:06,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash -424253610, now seen corresponding path program 1 times [2020-10-28 10:38:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:06,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646326025] [2020-10-28 10:38:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:07,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:12,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 923 [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:12,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 10:38:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 10:38:12,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:12,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:12,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:12,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:12,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:12,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:12,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:12,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:38:12,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:38:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:12,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:38:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:12,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:12,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:12,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 10:38:12,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:12,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 10:38:12,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:12,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 10:38:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:12,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:12,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:38:12,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 97 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 10:38:13,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646326025] [2020-10-28 10:38:13,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:38:13,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:38:13,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460343394] [2020-10-28 10:38:13,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:38:13,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:38:13,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:38:13,096 INFO L87 Difference]: Start difference. First operand 6844 states and 9691 transitions. Second operand 7 states. [2020-10-28 10:38:13,417 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:14,880 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:33,716 INFO L93 Difference]: Finished difference Result 24114 states and 34620 transitions. [2020-10-28 10:38:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:38:33,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 901 [2020-10-28 10:38:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:33,813 INFO L225 Difference]: With dead ends: 24114 [2020-10-28 10:38:33,813 INFO L226 Difference]: Without dead ends: 15584 [2020-10-28 10:38:33,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:38:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15584 states. [2020-10-28 10:38:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15584 to 14622. [2020-10-28 10:38:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14622 states. [2020-10-28 10:38:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14622 states to 14622 states and 18908 transitions. [2020-10-28 10:38:34,269 INFO L78 Accepts]: Start accepts. Automaton has 14622 states and 18908 transitions. Word has length 901 [2020-10-28 10:38:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:34,270 INFO L481 AbstractCegarLoop]: Abstraction has 14622 states and 18908 transitions. [2020-10-28 10:38:34,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:38:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14622 states and 18908 transitions. [2020-10-28 10:38:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2020-10-28 10:38:34,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:34,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:38:34,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:38:34,329 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 316372643, now seen corresponding path program 1 times [2020-10-28 10:38:34,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:34,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040231141] [2020-10-28 10:38:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:39,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 956 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 10:38:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:39,717 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:38:39,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:39,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:39,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:39,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:38:39,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:39,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:40,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 10:38:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:38:41,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040231141] [2020-10-28 10:38:41,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:38:41,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:38:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171185225] [2020-10-28 10:38:41,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:38:41,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:41,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:38:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:38:41,411 INFO L87 Difference]: Start difference. First operand 14622 states and 18908 transitions. Second operand 7 states. [2020-10-28 10:38:41,554 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:38:47,316 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 10:38:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:53,461 INFO L93 Difference]: Finished difference Result 29717 states and 39667 transitions. [2020-10-28 10:38:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:38:53,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 938 [2020-10-28 10:38:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:53,525 INFO L225 Difference]: With dead ends: 29717 [2020-10-28 10:38:53,525 INFO L226 Difference]: Without dead ends: 15101 [2020-10-28 10:38:53,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:38:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2020-10-28 10:38:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 14885. [2020-10-28 10:38:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14885 states. [2020-10-28 10:38:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14885 states to 14885 states and 19375 transitions. [2020-10-28 10:38:53,969 INFO L78 Accepts]: Start accepts. Automaton has 14885 states and 19375 transitions. Word has length 938 [2020-10-28 10:38:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:53,970 INFO L481 AbstractCegarLoop]: Abstraction has 14885 states and 19375 transitions. [2020-10-28 10:38:53,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:38:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 14885 states and 19375 transitions. [2020-10-28 10:38:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2020-10-28 10:38:54,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:54,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:38:54,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:38:54,032 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1845503377, now seen corresponding path program 1 times [2020-10-28 10:38:54,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:54,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867668273] [2020-10-28 10:38:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:54,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:59,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:59,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 974 [2020-10-28 10:38:59,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:38:59,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 10:38:59,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:59,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:59,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:59,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:59,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:59,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:38:59,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:59,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:59,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:59,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:59,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:38:59,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:38:59,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:59,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:59,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:59,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:59,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:38:59,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:59,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:38:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:59,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:59,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 10:38:59,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 10:38:59,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:39:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867668273] [2020-10-28 10:39:00,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:00,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:39:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469137167] [2020-10-28 10:39:00,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:39:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:39:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:39:00,273 INFO L87 Difference]: Start difference. First operand 14885 states and 19375 transitions. Second operand 7 states. [2020-10-28 10:39:04,523 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:14,588 INFO L93 Difference]: Finished difference Result 36855 states and 49718 transitions. [2020-10-28 10:39:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:39:14,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 954 [2020-10-28 10:39:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:14,679 INFO L225 Difference]: With dead ends: 36855 [2020-10-28 10:39:14,680 INFO L226 Difference]: Without dead ends: 21976 [2020-10-28 10:39:14,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:39:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2020-10-28 10:39:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 21061. [2020-10-28 10:39:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21061 states. [2020-10-28 10:39:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21061 states to 21061 states and 27298 transitions. [2020-10-28 10:39:15,406 INFO L78 Accepts]: Start accepts. Automaton has 21061 states and 27298 transitions. Word has length 954 [2020-10-28 10:39:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:15,407 INFO L481 AbstractCegarLoop]: Abstraction has 21061 states and 27298 transitions. [2020-10-28 10:39:15,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:39:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21061 states and 27298 transitions. [2020-10-28 10:39:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2020-10-28 10:39:15,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:15,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:39:15,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:39:15,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1051195884, now seen corresponding path program 1 times [2020-10-28 10:39:15,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:15,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650478017] [2020-10-28 10:39:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:15,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:20,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:20,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 977 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-28 10:39:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 817 [2020-10-28 10:39:20,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:21,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:21,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:21,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:21,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:21,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:21,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:21,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:21,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:39:21,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:39:21,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:21,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:39:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:21,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:21,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 10:39:21,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:21,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 10:39:21,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:21,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 10:39:21,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 10:39:22,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650478017] [2020-10-28 10:39:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:22,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:39:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392110910] [2020-10-28 10:39:22,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:39:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:39:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:39:22,128 INFO L87 Difference]: Start difference. First operand 21061 states and 27298 transitions. Second operand 5 states. [2020-10-28 10:39:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:35,901 INFO L93 Difference]: Finished difference Result 58168 states and 77432 transitions. [2020-10-28 10:39:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:39:35,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 957 [2020-10-28 10:39:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:36,035 INFO L225 Difference]: With dead ends: 58168 [2020-10-28 10:39:36,035 INFO L226 Difference]: Without dead ends: 36256 [2020-10-28 10:39:36,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:39:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36256 states. [2020-10-28 10:39:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36256 to 34545. [2020-10-28 10:39:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34545 states. [2020-10-28 10:39:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34545 states to 34545 states and 43145 transitions. [2020-10-28 10:39:36,992 INFO L78 Accepts]: Start accepts. Automaton has 34545 states and 43145 transitions. Word has length 957 [2020-10-28 10:39:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 34545 states and 43145 transitions. [2020-10-28 10:39:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:39:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 34545 states and 43145 transitions. [2020-10-28 10:39:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2020-10-28 10:39:37,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:37,074 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:39:37,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:39:37,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1879945946, now seen corresponding path program 1 times [2020-10-28 10:39:37,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:37,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979440792] [2020-10-28 10:39:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:39,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1007 [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:42,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:39:42,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:39:42,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-28 10:39:42,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:42,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:42,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:42,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:39:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:42,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:39:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:42,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 10:39:42,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:42,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 10:39:42,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:42,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 10:39:42,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:42,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 10:39:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 10:39:42,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 195 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 10:39:43,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979440792] [2020-10-28 10:39:43,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:43,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:39:43,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439752809] [2020-10-28 10:39:43,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:39:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:39:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:39:43,460 INFO L87 Difference]: Start difference. First operand 34545 states and 43145 transitions. Second operand 8 states. [2020-10-28 10:39:43,589 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:48,232 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:50,050 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:58,779 INFO L93 Difference]: Finished difference Result 86317 states and 111232 transitions. [2020-10-28 10:39:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:39:58,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 985 [2020-10-28 10:39:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:58,964 INFO L225 Difference]: With dead ends: 86317 [2020-10-28 10:39:58,965 INFO L226 Difference]: Without dead ends: 51818 [2020-10-28 10:39:59,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:39:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51818 states. [2020-10-28 10:40:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51818 to 50868. [2020-10-28 10:40:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50868 states. [2020-10-28 10:40:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50868 states to 50868 states and 63018 transitions. [2020-10-28 10:40:00,237 INFO L78 Accepts]: Start accepts. Automaton has 50868 states and 63018 transitions. Word has length 985 [2020-10-28 10:40:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:00,238 INFO L481 AbstractCegarLoop]: Abstraction has 50868 states and 63018 transitions. [2020-10-28 10:40:00,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:40:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50868 states and 63018 transitions. [2020-10-28 10:40:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2020-10-28 10:40:00,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:00,326 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:40:00,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:40:00,327 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -752951730, now seen corresponding path program 1 times [2020-10-28 10:40:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:00,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072366981] [2020-10-28 10:40:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:00,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:00,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:05,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1049 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-28 10:40:05,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:05,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:40:05,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:05,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:40:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:05,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:40:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:05,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:40:05,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:06,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-28 10:40:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 10:40:06,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 237 proven. 72 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:40:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072366981] [2020-10-28 10:40:07,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:40:07,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 10:40:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593445319] [2020-10-28 10:40:07,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 10:40:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 10:40:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:40:07,503 INFO L87 Difference]: Start difference. First operand 50868 states and 63018 transitions. Second operand 9 states. [2020-10-28 10:40:07,781 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:40:11,163 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:40:27,279 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 10:40:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:40:31,871 INFO L93 Difference]: Finished difference Result 151205 states and 196010 transitions. [2020-10-28 10:40:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 10:40:31,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1027 [2020-10-28 10:40:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:40:32,432 INFO L225 Difference]: With dead ends: 151205 [2020-10-28 10:40:32,432 INFO L226 Difference]: Without dead ends: 100347 [2020-10-28 10:40:32,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-28 10:40:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100347 states.