/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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:31:10,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:31:10,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:31:10,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:31:10,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:31:10,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:31:10,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:31:10,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:31:10,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:31:10,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:31:10,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:31:10,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:31:10,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:31:10,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:31:10,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:31:10,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:31:10,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:31:10,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:31:10,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:31:10,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:31:10,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:31:10,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:31:10,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:31:10,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:31:10,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:31:10,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:31:10,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:31:10,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:31:10,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:31:10,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:31:10,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:31:10,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:31:10,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:31:10,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:31:10,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:31:10,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:31:10,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:31:10,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:31:10,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:31:10,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:31:10,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:31:10,632 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 10:31:10,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:31:10,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:31:10,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:31:10,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:31:10,692 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:31:10,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:31:10,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:31:10,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:31:10,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:31:10,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:31:10,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:31:10,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:31:10,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:31:10,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:31:10,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:31:10,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:31:10,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:31:10,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:31:10,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:31:10,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:31:10,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:31:10,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:31:10,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:31:10,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:31:10,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:31:10,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:31:10,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:31:10,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:31:10,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:31:10,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:31:11,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:31:11,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:31:11,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:31:11,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:31:11,143 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:31:11,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label33.c [2020-10-28 10:31:11,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65a4933f6/fdf284b5385c42b9a25e6c4d95311f00/FLAGf792d4dd1 [2020-10-28 10:31:12,271 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:31:12,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label33.c [2020-10-28 10:31:12,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65a4933f6/fdf284b5385c42b9a25e6c4d95311f00/FLAGf792d4dd1 [2020-10-28 10:31:12,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65a4933f6/fdf284b5385c42b9a25e6c4d95311f00 [2020-10-28 10:31:12,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:31:12,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:31:12,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:31:12,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:31:12,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:31:12,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:31:12" (1/1) ... [2020-10-28 10:31:12,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ade471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:12, skipping insertion in model container [2020-10-28 10:31:12,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:31:12" (1/1) ... [2020-10-28 10:31:12,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:31:12,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:31:14,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:31:14,418 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:31:15,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:31:15,239 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:31:15,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15 WrapperNode [2020-10-28 10:31:15,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:31:15,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:31:15,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:31:15,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:31:15,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (1/1) ... [2020-10-28 10:31:15,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:31:15,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:31:15,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:31:15,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:31:15,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (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 10:31:15,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:31:15,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:31:15,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:31:15,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:31:15,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:31:15,734 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:31:15,734 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:31:15,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:31:15,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:31:15,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:31:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:31:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:31:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:31:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:31:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:31:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:31:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:31:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:31:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:31:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:31:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:31:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:31:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:31:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:31:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:31:21,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:31:21,164 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:31:21,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:31:21 BoogieIcfgContainer [2020-10-28 10:31:21,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:31:21,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:31:21,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:31:21,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:31:21,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:31:12" (1/3) ... [2020-10-28 10:31:21,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1306ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:31:21, skipping insertion in model container [2020-10-28 10:31:21,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:31:15" (2/3) ... [2020-10-28 10:31:21,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1306ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:31:21, skipping insertion in model container [2020-10-28 10:31:21,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:31:21" (3/3) ... [2020-10-28 10:31:21,185 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label33.c [2020-10-28 10:31:21,197 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:31:21,203 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:31:21,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:31:21,295 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:31:21,295 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:31:21,295 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:31:21,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:31:21,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:31:21,296 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:31:21,296 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:31:21,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:31:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-28 10:31:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2020-10-28 10:31:21,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:31:21,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:31:21,404 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:31:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:31:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 599316144, now seen corresponding path program 1 times [2020-10-28 10:31:21,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:31:21,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528761657] [2020-10-28 10:31:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:31:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:31:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:24,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:27,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:31:27,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 841 [2020-10-28 10:31:27,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:31:27,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-28 10:31:27,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:31:27,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:31:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 10:31:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:31:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 832 [2020-10-28 10:31:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:31:28,399 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:31:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:31:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:31:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:28,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:31:28,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:31:28,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:31:28,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:31:28,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:31:29,513 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 10:31:29,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528761657] [2020-10-28 10:31:29,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:31:29,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:31:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170300998] [2020-10-28 10:31:29,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:31:29,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:31:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:31:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:31:29,541 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-28 10:31:29,722 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:31:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:31:40,310 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-28 10:31:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:31:40,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 825 [2020-10-28 10:31:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:31:40,362 INFO L225 Difference]: With dead ends: 2677 [2020-10-28 10:31:40,362 INFO L226 Difference]: Without dead ends: 1703 [2020-10-28 10:31:40,371 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 10:31:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-28 10:31:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-28 10:31:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-28 10:31:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3030 transitions. [2020-10-28 10:31:40,559 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3030 transitions. Word has length 825 [2020-10-28 10:31:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:31:40,565 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 3030 transitions. [2020-10-28 10:31:40,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:31:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3030 transitions. [2020-10-28 10:31:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-10-28 10:31:40,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:31:40,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:31:40,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:31:40,616 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:31:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:31:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2100208910, now seen corresponding path program 1 times [2020-10-28 10:31:40,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:31:40,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553164222] [2020-10-28 10:31:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:31:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:31:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:43,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:45,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:31:45,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 851 [2020-10-28 10:31:45,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:31:45,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-28 10:31:45,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:31:45,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:31:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:31:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:31:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:31:45,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:31:46,327 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:31:46,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:31:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:31:46,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:46,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:31:46,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:31:46,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:31:46,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:31:46,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:31:46,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:31:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:31:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:31:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:31:46,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:31:46,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:31:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:31:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:31:46,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:31:46,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:31:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:31:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:31:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:31:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:31:47,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553164222] [2020-10-28 10:31:47,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:31:47,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:31:47,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623356636] [2020-10-28 10:31:47,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:31:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:31:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:31:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:31:47,052 INFO L87 Difference]: Start difference. First operand 1690 states and 3030 transitions. Second operand 7 states. [2020-10-28 10:31:47,205 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:31:53,882 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 10:31:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:31:59,828 INFO L93 Difference]: Finished difference Result 4315 states and 7635 transitions. [2020-10-28 10:31:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:31:59,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 833 [2020-10-28 10:31:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:31:59,846 INFO L225 Difference]: With dead ends: 4315 [2020-10-28 10:31:59,846 INFO L226 Difference]: Without dead ends: 2631 [2020-10-28 10:31:59,852 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 10:31:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2020-10-28 10:31:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2577. [2020-10-28 10:31:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2577 states. [2020-10-28 10:31:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4143 transitions. [2020-10-28 10:31:59,945 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4143 transitions. Word has length 833 [2020-10-28 10:31:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:31:59,945 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 4143 transitions. [2020-10-28 10:31:59,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:31:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4143 transitions. [2020-10-28 10:31:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2020-10-28 10:31:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:31:59,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:31:59,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:31:59,961 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:31:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:31:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1660358066, now seen corresponding path program 1 times [2020-10-28 10:31:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:31:59,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462425513] [2020-10-28 10:31:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:32:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:05,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:05,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 853 [2020-10-28 10:32:05,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:32:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 10:32:05,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:05,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:32:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:32:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:32:05,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:05,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:32:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:05,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:05,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:05,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:32:05,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:05,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:32:05,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:05,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:32:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:32:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:32:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:05,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:32:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:05,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:05,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:32:05,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:05,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:32:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:32:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462425513] [2020-10-28 10:32:05,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:32:05,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:32:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286819074] [2020-10-28 10:32:05,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:32:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:32:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:32:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:32:05,856 INFO L87 Difference]: Start difference. First operand 2577 states and 4143 transitions. Second operand 7 states. [2020-10-28 10:32:06,002 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:32:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:32:20,101 INFO L93 Difference]: Finished difference Result 7896 states and 12821 transitions. [2020-10-28 10:32:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:32:20,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 835 [2020-10-28 10:32:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:32:20,144 INFO L225 Difference]: With dead ends: 7896 [2020-10-28 10:32:20,145 INFO L226 Difference]: Without dead ends: 5325 [2020-10-28 10:32:20,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:32:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2020-10-28 10:32:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 5235. [2020-10-28 10:32:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5235 states. [2020-10-28 10:32:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7625 transitions. [2020-10-28 10:32:20,364 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7625 transitions. Word has length 835 [2020-10-28 10:32:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:32:20,364 INFO L481 AbstractCegarLoop]: Abstraction has 5235 states and 7625 transitions. [2020-10-28 10:32:20,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:32:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7625 transitions. [2020-10-28 10:32:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2020-10-28 10:32:20,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:32:20,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:32:20,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:32:20,394 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:32:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:32:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1265488525, now seen corresponding path program 1 times [2020-10-28 10:32:20,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:32:20,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498443860] [2020-10-28 10:32:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:32:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:20,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:25,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 856 [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:32:25,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:32:25,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 10:32:25,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:32:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:25,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:32:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:32:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:32:25,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:32:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:25,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:25,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 10:32:25,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:32:25,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:32:26,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498443860] [2020-10-28 10:32:26,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:32:26,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:32:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088268051] [2020-10-28 10:32:26,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:32:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:32:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:32:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:32:26,475 INFO L87 Difference]: Start difference. First operand 5235 states and 7625 transitions. Second operand 8 states. [2020-10-28 10:32:26,603 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:32:27,320 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:32:30,516 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:32:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:32:45,205 INFO L93 Difference]: Finished difference Result 21193 states and 32625 transitions. [2020-10-28 10:32:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 10:32:45,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 838 [2020-10-28 10:32:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:32:45,294 INFO L225 Difference]: With dead ends: 21193 [2020-10-28 10:32:45,294 INFO L226 Difference]: Without dead ends: 15964 [2020-10-28 10:32:45,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:32:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15964 states. [2020-10-28 10:32:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15964 to 15911. [2020-10-28 10:32:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15911 states. [2020-10-28 10:32:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15911 states to 15911 states and 22294 transitions. [2020-10-28 10:32:45,813 INFO L78 Accepts]: Start accepts. Automaton has 15911 states and 22294 transitions. Word has length 838 [2020-10-28 10:32:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:32:45,813 INFO L481 AbstractCegarLoop]: Abstraction has 15911 states and 22294 transitions. [2020-10-28 10:32:45,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:32:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 15911 states and 22294 transitions. [2020-10-28 10:32:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2020-10-28 10:32:45,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:32:45,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:32:45,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:32:45,886 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:32:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:32:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash -400954318, now seen corresponding path program 1 times [2020-10-28 10:32:45,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:32:45,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767024650] [2020-10-28 10:32:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:32:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:51,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 907 [2020-10-28 10:32:51,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:32:51,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 10:32:51,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:51,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:32:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 10:32:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 10:32:51,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:51,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:32:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:32:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:32:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:32:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:32:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:51,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:51,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:32:51,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:51,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:32:51,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:51,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:32:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:32:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:32:51,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:32:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:51,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:32:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:32:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:32:51,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:51,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:32:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:32:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:32:51,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:32:51,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:32:51,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:32:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:32:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:32:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:32:52,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767024650] [2020-10-28 10:32:52,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:32:52,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:32:52,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118570188] [2020-10-28 10:32:52,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:32:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:32:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:32:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:32:52,234 INFO L87 Difference]: Start difference. First operand 15911 states and 22294 transitions. Second operand 8 states. [2020-10-28 10:33:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:33:06,470 INFO L93 Difference]: Finished difference Result 45577 states and 66687 transitions. [2020-10-28 10:33:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:33:06,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 885 [2020-10-28 10:33:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:33:06,609 INFO L225 Difference]: With dead ends: 45577 [2020-10-28 10:33:06,609 INFO L226 Difference]: Without dead ends: 29672 [2020-10-28 10:33:06,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:33:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2020-10-28 10:33:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 26223. [2020-10-28 10:33:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26223 states. [2020-10-28 10:33:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26223 states to 26223 states and 35499 transitions. [2020-10-28 10:33:07,625 INFO L78 Accepts]: Start accepts. Automaton has 26223 states and 35499 transitions. Word has length 885 [2020-10-28 10:33:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:33:07,626 INFO L481 AbstractCegarLoop]: Abstraction has 26223 states and 35499 transitions. [2020-10-28 10:33:07,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:33:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 26223 states and 35499 transitions. [2020-10-28 10:33:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2020-10-28 10:33:07,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:33:07,741 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:33:07,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:33:07,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:33:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:33:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash 847378231, now seen corresponding path program 1 times [2020-10-28 10:33:07,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:33:07,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517066682] [2020-10-28 10:33:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:33:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:08,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:12,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 976 [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:33:12,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 10:33:12,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 10:33:12,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:33:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:13,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:13,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:33:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:13,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:13,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:33:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:33:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 10:33:13,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:13,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 10:33:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:33:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 10:33:13,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 10:33:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517066682] [2020-10-28 10:33:13,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:33:13,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:33:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540595017] [2020-10-28 10:33:13,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:33:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:33:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:33:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:33:13,840 INFO L87 Difference]: Start difference. First operand 26223 states and 35499 transitions. Second operand 7 states. [2020-10-28 10:33:13,972 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:33:26,176 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:33:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:33:29,418 INFO L93 Difference]: Finished difference Result 68361 states and 98575 transitions. [2020-10-28 10:33:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:33:29,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 954 [2020-10-28 10:33:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:33:29,601 INFO L225 Difference]: With dead ends: 68361 [2020-10-28 10:33:29,601 INFO L226 Difference]: Without dead ends: 42978 [2020-10-28 10:33:29,667 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 10:33:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42978 states. [2020-10-28 10:33:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42978 to 40949. [2020-10-28 10:33:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40949 states. [2020-10-28 10:33:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40949 states to 40949 states and 56542 transitions. [2020-10-28 10:33:30,924 INFO L78 Accepts]: Start accepts. Automaton has 40949 states and 56542 transitions. Word has length 954 [2020-10-28 10:33:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:33:30,925 INFO L481 AbstractCegarLoop]: Abstraction has 40949 states and 56542 transitions. [2020-10-28 10:33:30,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:33:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 40949 states and 56542 transitions. [2020-10-28 10:33:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2020-10-28 10:33:31,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:33:31,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:33:31,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:33:31,044 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:33:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:33:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1349924557, now seen corresponding path program 1 times [2020-10-28 10:33:31,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:33:31,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894843464] [2020-10-28 10:33:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:33:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1072 [2020-10-28 10:33:36,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 10:33:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:33:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:33:36,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:36,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:33:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:33:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 10:33:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 10:33:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 10:33:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-10-28 10:33:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 10:33:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-28 10:33:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:36,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:36,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:33:36,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 288 proven. 39 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-28 10:33:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894843464] [2020-10-28 10:33:37,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:33:37,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:33:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925166494] [2020-10-28 10:33:37,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:33:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:33:37,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:33:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:33:37,371 INFO L87 Difference]: Start difference. First operand 40949 states and 56542 transitions. Second operand 7 states. [2020-10-28 10:33:44,977 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:33:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:33:51,955 INFO L93 Difference]: Finished difference Result 88264 states and 125713 transitions. [2020-10-28 10:33:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:33:51,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1046 [2020-10-28 10:33:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:33:52,132 INFO L225 Difference]: With dead ends: 88264 [2020-10-28 10:33:52,132 INFO L226 Difference]: Without dead ends: 44775 [2020-10-28 10:33:52,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:33:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44775 states. [2020-10-28 10:33:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44775 to 43506. [2020-10-28 10:33:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43506 states. [2020-10-28 10:33:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43506 states to 43506 states and 53566 transitions. [2020-10-28 10:33:53,409 INFO L78 Accepts]: Start accepts. Automaton has 43506 states and 53566 transitions. Word has length 1046 [2020-10-28 10:33:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:33:53,410 INFO L481 AbstractCegarLoop]: Abstraction has 43506 states and 53566 transitions. [2020-10-28 10:33:53,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:33:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 43506 states and 53566 transitions. [2020-10-28 10:33:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2020-10-28 10:33:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:33:53,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:33:53,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:33:53,480 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:33:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:33:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2117501267, now seen corresponding path program 1 times [2020-10-28 10:33:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:33:53,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932919999] [2020-10-28 10:33:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:33:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:54,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:58,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:58,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1102 [2020-10-28 10:33:58,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:33:58,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 10:33:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:33:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:58,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:58,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:33:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:33:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:33:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:58,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:33:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:59,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:59,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 10:33:59,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 10:33:59,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:59,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:33:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:33:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 10:33:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:59,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-28 10:33:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:59,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:59,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 10:33:59,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:59,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 10:33:59,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:59,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:59,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:59,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 10:33:59,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:59,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:33:59,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-28 10:33:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:33:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:33:59,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:33:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:33:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 10:33:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:33:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 246 proven. 120 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 10:34:00,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932919999] [2020-10-28 10:34:00,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:34:00,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:34:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222257062] [2020-10-28 10:34:00,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:34:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:34:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:34:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:34:00,382 INFO L87 Difference]: Start difference. First operand 43506 states and 53566 transitions. Second operand 7 states. [2020-10-28 10:34:00,512 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:34:04,707 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 10:34:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:34:12,519 INFO L93 Difference]: Finished difference Result 86550 states and 107269 transitions. [2020-10-28 10:34:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:34:12,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1080 [2020-10-28 10:34:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:34:12,648 INFO L225 Difference]: With dead ends: 86550 [2020-10-28 10:34:12,648 INFO L226 Difference]: Without dead ends: 43884 [2020-10-28 10:34:12,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:34:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43884 states. [2020-10-28 10:34:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43884 to 43634. [2020-10-28 10:34:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43634 states. [2020-10-28 10:34:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43634 states to 43634 states and 53579 transitions. [2020-10-28 10:34:13,575 INFO L78 Accepts]: Start accepts. Automaton has 43634 states and 53579 transitions. Word has length 1080 [2020-10-28 10:34:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:34:13,576 INFO L481 AbstractCegarLoop]: Abstraction has 43634 states and 53579 transitions. [2020-10-28 10:34:13,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:34:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 43634 states and 53579 transitions. [2020-10-28 10:34:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2020-10-28 10:34:13,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:34:13,639 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:34:13,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:34:13,640 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:34:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:34:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1553639172, now seen corresponding path program 1 times [2020-10-28 10:34:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:34:13,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749474480] [2020-10-28 10:34:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:34:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:13,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:18,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:18,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1123 [2020-10-28 10:34:18,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:34:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 10:34:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:19,196 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:34:19,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:34:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:19,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:19,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:34:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:19,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:19,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:34:19,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:19,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:34:19,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:19,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:34:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:34:19,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 10:34:19,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:19,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-28 10:34:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:19,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 10:34:19,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 10:34:19,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:19,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 10:34:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:19,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:19,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 10:34:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 351 proven. 65 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-28 10:34:20,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749474480] [2020-10-28 10:34:20,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:34:20,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:34:20,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80705244] [2020-10-28 10:34:20,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:34:20,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:34:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:34:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:34:20,543 INFO L87 Difference]: Start difference. First operand 43634 states and 53579 transitions. Second operand 7 states. [2020-10-28 10:34:20,674 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:34:25,507 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:34:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:34:33,180 INFO L93 Difference]: Finished difference Result 95878 states and 120252 transitions. [2020-10-28 10:34:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:34:33,182 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1099 [2020-10-28 10:34:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:34:33,333 INFO L225 Difference]: With dead ends: 95878 [2020-10-28 10:34:33,334 INFO L226 Difference]: Without dead ends: 53084 [2020-10-28 10:34:33,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:34:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53084 states. [2020-10-28 10:34:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53084 to 52998. [2020-10-28 10:34:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52998 states. [2020-10-28 10:34:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52998 states to 52998 states and 64786 transitions. [2020-10-28 10:34:34,352 INFO L78 Accepts]: Start accepts. Automaton has 52998 states and 64786 transitions. Word has length 1099 [2020-10-28 10:34:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:34:34,353 INFO L481 AbstractCegarLoop]: Abstraction has 52998 states and 64786 transitions. [2020-10-28 10:34:34,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:34:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 52998 states and 64786 transitions. [2020-10-28 10:34:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2020-10-28 10:34:34,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:34:34,418 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:34:34,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:34:34,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:34:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:34:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash 312260735, now seen corresponding path program 1 times [2020-10-28 10:34:34,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:34:34,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471184529] [2020-10-28 10:34:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:34:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:34,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:35,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:39,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1178 [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5168 [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:34:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-28 10:34:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-28 10:34:39,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:40,123 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:34:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:34:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:40,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:40,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:40,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:34:40,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:40,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:34:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:40,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:40,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:40,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:34:40,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:40,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:34:40,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:40,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:40,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:40,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:34:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:40,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:40,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 10:34:40,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:34:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:40,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:40,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-28 10:34:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:40,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:40,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 10:34:40,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:34:40,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:40,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:34:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:34:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 10:34:40,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:34:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-28 10:34:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:40,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:40,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 10:34:40,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:34:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-10-28 10:34:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:34:41,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:34:41,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:34:41,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:34:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 10:34:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:34:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:34:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 448 proven. 27 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 10:34:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471184529] [2020-10-28 10:34:42,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:34:42,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:34:42,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449080386] [2020-10-28 10:34:42,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:34:42,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:34:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:34:42,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:34:42,389 INFO L87 Difference]: Start difference. First operand 52998 states and 64786 transitions. Second operand 7 states. [2020-10-28 10:34:42,687 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 97