/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem17_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:26:10,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:26:10,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:26:10,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:26:10,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:26:10,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:26:10,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:26:10,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:26:10,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:26:10,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:26:10,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:26:10,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:26:10,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:26:10,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:26:10,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:26:10,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:26:10,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:26:10,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:26:10,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:26:10,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:26:10,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:26:10,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:26:10,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:26:10,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:26:10,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:26:10,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:26:10,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:26:10,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:26:10,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:26:10,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:26:10,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:26:10,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:26:10,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:26:10,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:26:10,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:26:10,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:26:10,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:26:10,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:26:10,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:26:10,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:26:10,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:26:10,150 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 [2020-10-29 08:26:10,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:26:10,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:26:10,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:26:10,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:26:10,190 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:26:10,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:26:10,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:26:10,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:26:10,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:26:10,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:26:10,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:26:10,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:26:10,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:26:10,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:26:10,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:26:10,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:26:10,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:26:10,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:26:10,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:26:10,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:26:10,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:26:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:26:10,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:26:10,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:26:10,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:26:10,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:26:10,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:26:10,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:26:10,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:26:10,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:26:10,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:26:10,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:26:10,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:26:10,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:26:10,766 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:26:10,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label59.c [2020-10-29 08:26:10,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24aaba61e/9882449898274b3a8b9088e55e4e86fb/FLAG293dc1782 [2020-10-29 08:26:11,866 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:26:11,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label59.c [2020-10-29 08:26:11,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24aaba61e/9882449898274b3a8b9088e55e4e86fb/FLAG293dc1782 [2020-10-29 08:26:12,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24aaba61e/9882449898274b3a8b9088e55e4e86fb [2020-10-29 08:26:12,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:26:12,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:26:12,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:26:12,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:26:12,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:26:12,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:26:12" (1/1) ... [2020-10-29 08:26:12,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a6a057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:12, skipping insertion in model container [2020-10-29 08:26:12,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:26:12" (1/1) ... [2020-10-29 08:26:12,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:26:12,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:26:13,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:26:13,655 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:26:14,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:26:14,366 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:26:14,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14 WrapperNode [2020-10-29 08:26:14,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:26:14,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:26:14,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:26:14,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:26:14,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (1/1) ... [2020-10-29 08:26:14,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:26:14,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:26:14,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:26:14,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:26:14,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (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 [2020-10-29 08:26:14,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:26:14,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:26:14,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:26:14,770 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:26:14,770 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:26:14,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:26:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:26:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:26:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:26:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:26:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:26:14,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:26:14,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:26:14,772 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:26:14,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:26:14,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:26:24,507 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:26:24,507 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:26:24,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:26:24 BoogieIcfgContainer [2020-10-29 08:26:24,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:26:24,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:26:24,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:26:24,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:26:24,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:26:12" (1/3) ... [2020-10-29 08:26:24,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e5d7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:26:24, skipping insertion in model container [2020-10-29 08:26:24,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:14" (2/3) ... [2020-10-29 08:26:24,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e5d7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:26:24, skipping insertion in model container [2020-10-29 08:26:24,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:26:24" (3/3) ... [2020-10-29 08:26:24,522 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label59.c [2020-10-29 08:26:24,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:26:24,547 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:26:24,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:26:24,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:26:24,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:26:24,605 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:26:24,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:26:24,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:26:24,605 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:26:24,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:26:24,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:26:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:26:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 08:26:24,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:24,654 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] [2020-10-29 08:26:24,655 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1326414411, now seen corresponding path program 1 times [2020-10-29 08:26:24,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:24,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145989486] [2020-10-29 08:26:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:25,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:25,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 08:26:25,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:25,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-29 08:26:25,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:25,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:26:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 08:26:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:26:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:25,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:25,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:25,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:25,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 08:26:25,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:25,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:25,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:26:25,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145989486] [2020-10-29 08:26:25,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:26:25,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:26:25,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102807585] [2020-10-29 08:26:25,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:26:25,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:26:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:26:25,864 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:26:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:38,147 INFO L93 Difference]: Finished difference Result 1734 states and 3143 transitions. [2020-10-29 08:26:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:26:38,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-29 08:26:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:38,205 INFO L225 Difference]: With dead ends: 1734 [2020-10-29 08:26:38,207 INFO L226 Difference]: Without dead ends: 1048 [2020-10-29 08:26:38,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:26:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-10-29 08:26:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1029. [2020-10-29 08:26:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-10-29 08:26:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1764 transitions. [2020-10-29 08:26:38,410 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1764 transitions. Word has length 39 [2020-10-29 08:26:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1764 transitions. [2020-10-29 08:26:38,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:26:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1764 transitions. [2020-10-29 08:26:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 08:26:38,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:38,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:38,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:26:38,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash -509543706, now seen corresponding path program 1 times [2020-10-29 08:26:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:38,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674219635] [2020-10-29 08:26:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-29 08:26:40,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:26:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-29 08:26:40,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:26:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:26:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:40,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:40,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 08:26:40,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:40,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:40,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:40,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:26:40,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:26:40,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-29 08:26:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 08:26:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 08:26:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:26:40,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674219635] [2020-10-29 08:26:40,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:26:40,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:26:40,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988521335] [2020-10-29 08:26:40,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:26:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:26:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:26:40,814 INFO L87 Difference]: Start difference. First operand 1029 states and 1764 transitions. Second operand 7 states. [2020-10-29 08:26:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:58,732 INFO L93 Difference]: Finished difference Result 3007 states and 5211 transitions. [2020-10-29 08:26:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:26:58,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-29 08:26:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:58,756 INFO L225 Difference]: With dead ends: 3007 [2020-10-29 08:26:58,756 INFO L226 Difference]: Without dead ends: 1984 [2020-10-29 08:26:58,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:26:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2020-10-29 08:26:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1936. [2020-10-29 08:26:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2020-10-29 08:26:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2920 transitions. [2020-10-29 08:26:58,857 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2920 transitions. Word has length 108 [2020-10-29 08:26:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:58,857 INFO L481 AbstractCegarLoop]: Abstraction has 1936 states and 2920 transitions. [2020-10-29 08:26:58,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:26:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2920 transitions. [2020-10-29 08:26:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-29 08:26:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:58,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:58,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:26:58,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 836137738, now seen corresponding path program 1 times [2020-10-29 08:26:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24499512] [2020-10-29 08:26:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:58,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:00,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-29 08:27:00,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:27:00,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-10-29 08:27:00,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:00,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:00,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:27:00,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:00,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:27:00,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:00,238 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:00,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:00,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:00,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:00,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:00,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:27:00,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:00,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:00,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:00,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:00,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:27:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-29 08:27:00,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:00,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:00,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:00,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:00,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:27:00,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:00,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24499512] [2020-10-29 08:27:00,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:27:00,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:27:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553758714] [2020-10-29 08:27:00,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:00,631 INFO L87 Difference]: Start difference. First operand 1936 states and 2920 transitions. Second operand 7 states. [2020-10-29 08:27:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:16,094 INFO L93 Difference]: Finished difference Result 4403 states and 7001 transitions. [2020-10-29 08:27:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:27:16,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-29 08:27:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:16,121 INFO L225 Difference]: With dead ends: 4403 [2020-10-29 08:27:16,121 INFO L226 Difference]: Without dead ends: 2473 [2020-10-29 08:27:16,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:27:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-10-29 08:27:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1932. [2020-10-29 08:27:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2020-10-29 08:27:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2699 transitions. [2020-10-29 08:27:16,227 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2699 transitions. Word has length 110 [2020-10-29 08:27:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:16,231 INFO L481 AbstractCegarLoop]: Abstraction has 1932 states and 2699 transitions. [2020-10-29 08:27:16,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:27:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2699 transitions. [2020-10-29 08:27:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-29 08:27:16,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:16,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:16,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:27:16,248 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 730395903, now seen corresponding path program 1 times [2020-10-29 08:27:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:16,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618835655] [2020-10-29 08:27:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:16,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:17,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:17,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 08:27:17,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:27:17,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-29 08:27:17,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:17,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:17,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:27:17,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:17,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 08:27:17,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:17,418 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:17,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:17,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:17,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:17,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 08:27:17,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:17,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:17,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:17,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:17,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:17,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:17,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:17,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:17,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:17,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:27:17,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:17,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-29 08:27:17,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:17,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:27:17,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:27:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:17,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618835655] [2020-10-29 08:27:17,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:17,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:27:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056288940] [2020-10-29 08:27:17,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:27:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:27:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:27:17,920 INFO L87 Difference]: Start difference. First operand 1932 states and 2699 transitions. Second operand 8 states. [2020-10-29 08:27:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:38,743 INFO L93 Difference]: Finished difference Result 5308 states and 7303 transitions. [2020-10-29 08:27:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:27:38,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-10-29 08:27:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:38,766 INFO L225 Difference]: With dead ends: 5308 [2020-10-29 08:27:38,766 INFO L226 Difference]: Without dead ends: 3337 [2020-10-29 08:27:38,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:27:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2020-10-29 08:27:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 3289. [2020-10-29 08:27:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3289 states. [2020-10-29 08:27:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4367 transitions. [2020-10-29 08:27:38,886 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4367 transitions. Word has length 113 [2020-10-29 08:27:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:38,887 INFO L481 AbstractCegarLoop]: Abstraction has 3289 states and 4367 transitions. [2020-10-29 08:27:38,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:27:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4367 transitions. [2020-10-29 08:27:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 08:27:38,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:38,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:38,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:27:38,890 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash -208975958, now seen corresponding path program 1 times [2020-10-29 08:27:38,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:38,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742330323] [2020-10-29 08:27:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:38,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:39,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:39,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 08:27:39,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-29 08:27:39,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:39,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:27:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 08:27:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:39,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:39,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:39,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:39,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:39,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:39,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:39,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:39,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:39,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:39,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:27:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:39,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742330323] [2020-10-29 08:27:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:27:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548321649] [2020-10-29 08:27:39,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:27:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:27:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:27:39,715 INFO L87 Difference]: Start difference. First operand 3289 states and 4367 transitions. Second operand 5 states. [2020-10-29 08:27:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:58,576 INFO L93 Difference]: Finished difference Result 8857 states and 12171 transitions. [2020-10-29 08:27:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:27:58,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-29 08:27:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:58,607 INFO L225 Difference]: With dead ends: 8857 [2020-10-29 08:27:58,607 INFO L226 Difference]: Without dead ends: 4672 [2020-10-29 08:27:58,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:27:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2020-10-29 08:27:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4648. [2020-10-29 08:27:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4648 states. [2020-10-29 08:27:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 5885 transitions. [2020-10-29 08:27:58,738 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 5885 transitions. Word has length 126 [2020-10-29 08:27:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:58,739 INFO L481 AbstractCegarLoop]: Abstraction has 4648 states and 5885 transitions. [2020-10-29 08:27:58,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:27:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 5885 transitions. [2020-10-29 08:27:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-29 08:27:58,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:58,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:58,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:27:58,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -106217898, now seen corresponding path program 1 times [2020-10-29 08:27:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:58,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933649570] [2020-10-29 08:27:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:00,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:00,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-29 08:28:00,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:28:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-10-29 08:28:00,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:00,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:00,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:00,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:28:00,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 08:28:00,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:00,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:00,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:00,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:28:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:00,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:00,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:00,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:28:00,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:28:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:00,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:28:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:00,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:00,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:00,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 08:28:00,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:00,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-29 08:28:00,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:00,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 08:28:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:28:00,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933649570] [2020-10-29 08:28:00,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:00,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:28:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664812588] [2020-10-29 08:28:00,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:28:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:28:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:28:00,693 INFO L87 Difference]: Start difference. First operand 4648 states and 5885 transitions. Second operand 8 states. [2020-10-29 08:28:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:17,396 INFO L93 Difference]: Finished difference Result 11590 states and 15499 transitions. [2020-10-29 08:28:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:28:17,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 196 [2020-10-29 08:28:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:17,433 INFO L225 Difference]: With dead ends: 11590 [2020-10-29 08:28:17,433 INFO L226 Difference]: Without dead ends: 7381 [2020-10-29 08:28:17,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:28:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2020-10-29 08:28:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 7368. [2020-10-29 08:28:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7368 states. [2020-10-29 08:28:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7368 states to 7368 states and 9420 transitions. [2020-10-29 08:28:17,641 INFO L78 Accepts]: Start accepts. Automaton has 7368 states and 9420 transitions. Word has length 196 [2020-10-29 08:28:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:17,642 INFO L481 AbstractCegarLoop]: Abstraction has 7368 states and 9420 transitions. [2020-10-29 08:28:17,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:28:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7368 states and 9420 transitions. [2020-10-29 08:28:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-29 08:28:17,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:17,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:17,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:28:17,646 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -991138333, now seen corresponding path program 1 times [2020-10-29 08:28:17,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:17,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785630144] [2020-10-29 08:28:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:21,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:21,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-29 08:28:21,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:28:21,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-29 08:28:21,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:22,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:28:22,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:28:22,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:28:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:28:22,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:28:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 08:28:22,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:28:22,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785630144] [2020-10-29 08:28:22,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:22,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:28:22,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89742047] [2020-10-29 08:28:22,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:28:22,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:28:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:28:22,884 INFO L87 Difference]: Start difference. First operand 7368 states and 9420 transitions. Second operand 10 states. [2020-10-29 08:28:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:55,686 INFO L93 Difference]: Finished difference Result 24631 states and 34114 transitions. [2020-10-29 08:28:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 08:28:55,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 209 [2020-10-29 08:28:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:55,776 INFO L225 Difference]: With dead ends: 24631 [2020-10-29 08:28:55,777 INFO L226 Difference]: Without dead ends: 16335 [2020-10-29 08:28:55,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-29 08:28:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16335 states. [2020-10-29 08:28:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16335 to 16157. [2020-10-29 08:28:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16157 states. [2020-10-29 08:28:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16157 states to 16157 states and 20928 transitions. [2020-10-29 08:28:56,497 INFO L78 Accepts]: Start accepts. Automaton has 16157 states and 20928 transitions. Word has length 209 [2020-10-29 08:28:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:56,497 INFO L481 AbstractCegarLoop]: Abstraction has 16157 states and 20928 transitions. [2020-10-29 08:28:56,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:28:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16157 states and 20928 transitions. [2020-10-29 08:28:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-29 08:28:56,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:56,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:56,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:28:56,501 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 123639133, now seen corresponding path program 1 times [2020-10-29 08:28:56,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:56,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953602523] [2020-10-29 08:28:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:57,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-29 08:28:57,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:28:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-29 08:28:57,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:57,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:28:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:28:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-29 08:28:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:28:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:57,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:58,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:58,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:58,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:58,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:28:58,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:58,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:58,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:58,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:58,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:28:58,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:58,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 08:28:58,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:58,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:28:58,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:58,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:28:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:58,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:58,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:58,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:28:58,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:28:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:28:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:28:58,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953602523] [2020-10-29 08:28:58,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:58,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:28:58,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506778745] [2020-10-29 08:28:58,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:28:58,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:28:58,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:28:58,561 INFO L87 Difference]: Start difference. First operand 16157 states and 20928 transitions. Second operand 5 states. [2020-10-29 08:29:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:11,650 INFO L93 Difference]: Finished difference Result 32319 states and 42354 transitions. [2020-10-29 08:29:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:29:11,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2020-10-29 08:29:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:11,719 INFO L225 Difference]: With dead ends: 32319 [2020-10-29 08:29:11,719 INFO L226 Difference]: Without dead ends: 16601 [2020-10-29 08:29:11,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:29:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16601 states. [2020-10-29 08:29:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16601 to 16592. [2020-10-29 08:29:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16592 states. [2020-10-29 08:29:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16592 states to 16592 states and 21565 transitions. [2020-10-29 08:29:12,375 INFO L78 Accepts]: Start accepts. Automaton has 16592 states and 21565 transitions. Word has length 212 [2020-10-29 08:29:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:12,375 INFO L481 AbstractCegarLoop]: Abstraction has 16592 states and 21565 transitions. [2020-10-29 08:29:12,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:29:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 16592 states and 21565 transitions. [2020-10-29 08:29:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-29 08:29:12,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:12,382 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:12,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:29:12,382 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1425780664, now seen corresponding path program 1 times [2020-10-29 08:29:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:12,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799608783] [2020-10-29 08:29:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:12,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:16,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4146 [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:29:16,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:29:16,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 290 [2020-10-29 08:29:16,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:16,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:16,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:29:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:17,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:17,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:29:17,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:17,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-29 08:29:17,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:17,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:17,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:29:17,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:17,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:29:17,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:17,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:29:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:29:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-29 08:29:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:17,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:29:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:29:17,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:29:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:17,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:17,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:17,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:17,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:29:17,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-29 08:29:17,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799608783] [2020-10-29 08:29:17,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:17,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:17,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726674244] [2020-10-29 08:29:17,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:29:17,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:29:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:29:17,684 INFO L87 Difference]: Start difference. First operand 16592 states and 21565 transitions. Second operand 8 states. [2020-10-29 08:29:17,844 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:29:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:48,194 INFO L93 Difference]: Finished difference Result 50010 states and 66852 transitions. [2020-10-29 08:29:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 08:29:48,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 283 [2020-10-29 08:29:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:48,346 INFO L225 Difference]: With dead ends: 50010 [2020-10-29 08:29:48,346 INFO L226 Difference]: Without dead ends: 36149 [2020-10-29 08:29:48,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:29:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36149 states. [2020-10-29 08:29:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36149 to 32968. [2020-10-29 08:29:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32968 states. [2020-10-29 08:29:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32968 states to 32968 states and 41741 transitions. [2020-10-29 08:29:49,565 INFO L78 Accepts]: Start accepts. Automaton has 32968 states and 41741 transitions. Word has length 283 [2020-10-29 08:29:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:49,566 INFO L481 AbstractCegarLoop]: Abstraction has 32968 states and 41741 transitions. [2020-10-29 08:29:49,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:29:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32968 states and 41741 transitions. [2020-10-29 08:29:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-29 08:29:49,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:49,573 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:49,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:29:49,574 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash -57498889, now seen corresponding path program 1 times [2020-10-29 08:29:49,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:49,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657304433] [2020-10-29 08:29:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:54,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:54,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-29 08:29:54,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:29:54,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:29:54,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:54,930 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:29:54,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:54,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:54,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:54,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:54,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:54,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:54,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:55,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:55,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:29:55,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:55,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:29:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:55,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:29:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:55,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:55,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:29:55,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:29:55,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:55,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:29:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:55,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:55,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:55,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:29:55,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:55,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 181 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:29:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657304433] [2020-10-29 08:29:55,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:55,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261742810] [2020-10-29 08:29:55,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:29:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:29:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:29:55,902 INFO L87 Difference]: Start difference. First operand 32968 states and 41741 transitions. Second operand 7 states. [2020-10-29 08:29:57,056 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70