/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=DEEPEST --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/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:27,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:27,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:27,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:27,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:27,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:27,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:27,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:27,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:27,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:27,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:27,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:27,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:27,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:27,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:27,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:27,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:27,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:27,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:27,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:27,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:27,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:27,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:27,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:27,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:27,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:27,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:27,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:27,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:27,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:27,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:27,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:27,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:27,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:27,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:27,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:27,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:27,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:27,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:27,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:27,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:27,798 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 [2020-10-27 14:07:27,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:27,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:27,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:27,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:27,846 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:27,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:27,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:27,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:27,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:27,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:27,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:27,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:27,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:27,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:27,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:27,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:27,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:27,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:27,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:27,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:27,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:27,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:27,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:27,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:27,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:27,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:27,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:27,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:27,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:27,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:28,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:28,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:28,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:28,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:28,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:28,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-27 14:07:28,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461336aba/5bd5ed81c511459e9ae0396ed14e4e8f/FLAG793964ad7 [2020-10-27 14:07:28,902 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:28,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-27 14:07:28,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461336aba/5bd5ed81c511459e9ae0396ed14e4e8f/FLAG793964ad7 [2020-10-27 14:07:29,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461336aba/5bd5ed81c511459e9ae0396ed14e4e8f [2020-10-27 14:07:29,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:29,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:29,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:29,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:29,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:29,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262328f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29, skipping insertion in model container [2020-10-27 14:07:29,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:29,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:29,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:29,479 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:29,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:29,517 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:29,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29 WrapperNode [2020-10-27 14:07:29,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:29,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:29,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:29,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:29,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:29,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:29,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:29,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:29,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (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 [2020-10-27 14:07:29,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:30,019 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:30,020 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-27 14:07:30,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:30 BoogieIcfgContainer [2020-10-27 14:07:30,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:30,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:30,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:30,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:30,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:29" (1/3) ... [2020-10-27 14:07:30,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b2a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:30, skipping insertion in model container [2020-10-27 14:07:30,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29" (2/3) ... [2020-10-27 14:07:30,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b2a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:30, skipping insertion in model container [2020-10-27 14:07:30,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:30" (3/3) ... [2020-10-27 14:07:30,033 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-27 14:07:30,049 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:30,057 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:30,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:30,148 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:30,148 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:30,148 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:30,149 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:30,149 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:30,149 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:30,149 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:30,149 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-27 14:07:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:07:30,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:30,182 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] [2020-10-27 14:07:30,182 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash 924121920, now seen corresponding path program 1 times [2020-10-27 14:07:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:30,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233622471] [2020-10-27 14:07:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:32,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:07:32,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:07:32,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-10-27 14:07:32,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:32,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:07:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:07:32,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:32,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:32,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:32,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:32,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:32,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:32,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233622471] [2020-10-27 14:07:32,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:32,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:32,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891192419] [2020-10-27 14:07:32,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:32,319 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-27 14:07:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:32,443 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2020-10-27 14:07:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:32,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-27 14:07:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:32,452 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:07:32,453 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:07:32,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:07:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 14:07:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:07:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-27 14:07:32,515 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2020-10-27 14:07:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:32,516 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-27 14:07:32,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-27 14:07:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:07:32,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:32,518 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] [2020-10-27 14:07:32,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:32,519 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -538220782, now seen corresponding path program 1 times [2020-10-27 14:07:32,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:32,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073682031] [2020-10-27 14:07:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:37,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:07:37,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:07:37,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:07:37,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:37,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:37,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:07:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:37,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:37,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:37,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:37,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:37,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073682031] [2020-10-27 14:07:37,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:37,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:37,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298321945] [2020-10-27 14:07:37,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:37,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:37,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:37,735 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-10-27 14:07:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:38,024 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-10-27 14:07:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:38,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-27 14:07:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:38,026 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:07:38,026 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:07:38,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:07:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-27 14:07:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:07:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-27 14:07:38,055 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2020-10-27 14:07:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:38,055 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-27 14:07:38,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-27 14:07:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:07:38,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:38,057 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] [2020-10-27 14:07:38,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:38,058 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1776443102, now seen corresponding path program 1 times [2020-10-27 14:07:38,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:38,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701548870] [2020-10-27 14:07:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:38,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:43,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:07:43,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:07:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:07:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:07:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:43,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:43,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:43,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:43,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:43,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:43,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:07:43,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701548870] [2020-10-27 14:07:43,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:43,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:43,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112407970] [2020-10-27 14:07:43,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:43,212 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-27 14:07:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:43,492 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-10-27 14:07:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:43,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-27 14:07:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:43,494 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:07:43,494 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:07:43,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:07:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:07:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 14:07:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:07:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-27 14:07:43,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2020-10-27 14:07:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:43,505 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-27 14:07:43,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-27 14:07:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:07:43,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:43,510 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:07:43,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:43,510 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1498598230, now seen corresponding path program 2 times [2020-10-27 14:07:43,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:43,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620910925] [2020-10-27 14:07:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:48,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:07:48,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:07:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:07:48,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:07:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:07:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:07:50,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:50,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:50,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:50,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620910925] [2020-10-27 14:07:50,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:50,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:07:50,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610172628] [2020-10-27 14:07:50,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:07:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:07:50,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:07:50,843 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 31 states. [2020-10-27 14:07:51,322 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 14:07:51,786 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 14:07:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:53,326 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-27 14:07:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:07:53,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-10-27 14:07:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:53,328 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:07:53,328 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:07:53,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:07:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:07:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-27 14:07:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:07:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-10-27 14:07:53,345 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 49 [2020-10-27 14:07:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:53,345 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-10-27 14:07:53,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:07:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-10-27 14:07:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:07:53,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:53,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:07:53,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:53,348 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -44116372, now seen corresponding path program 3 times [2020-10-27 14:07:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:53,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431369720] [2020-10-27 14:07:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:07:58,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:58,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:07:58,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:07:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:07:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:58,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:07:58,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431369720] [2020-10-27 14:07:58,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:58,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:07:58,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648940407] [2020-10-27 14:07:58,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:07:58,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:07:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:07:58,474 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 10 states. [2020-10-27 14:07:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:59,070 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2020-10-27 14:07:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:07:59,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-27 14:07:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:59,072 INFO L225 Difference]: With dead ends: 123 [2020-10-27 14:07:59,072 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:07:59,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:07:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:07:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-27 14:07:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:07:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-27 14:07:59,089 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 51 [2020-10-27 14:07:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:59,089 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-27 14:07:59,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:07:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-27 14:07:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:07:59,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:59,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:07:59,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:07:59,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -906571988, now seen corresponding path program 4 times [2020-10-27 14:07:59,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:59,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952538120] [2020-10-27 14:07:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:08:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:04,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:04,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:04,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:04,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:04,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:04,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952538120] [2020-10-27 14:08:04,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:04,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260688244] [2020-10-27 14:08:04,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:04,214 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 10 states. [2020-10-27 14:08:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:04,565 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-27 14:08:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:08:04,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-27 14:08:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:04,568 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:08:04,568 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:08:04,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:08:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-27 14:08:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:08:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-27 14:08:04,578 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 51 [2020-10-27 14:08:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:04,579 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-27 14:08:04,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-27 14:08:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:08:04,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:04,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:04,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:04,581 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash 415950966, now seen corresponding path program 5 times [2020-10-27 14:08:04,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:04,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853975466] [2020-10-27 14:08:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:09,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:08:09,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:09,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-27 14:08:09,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:09,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 14:08:09,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:09,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:08:09,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:13,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:13,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:13,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853975466] [2020-10-27 14:08:13,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:13,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 14:08:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533304712] [2020-10-27 14:08:13,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 14:08:13,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 14:08:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:08:13,359 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 47 states. [2020-10-27 14:08:14,341 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-10-27 14:08:15,385 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-27 14:08:15,646 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-27 14:08:16,051 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-27 14:08:17,430 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-27 14:08:17,651 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2020-10-27 14:08:17,883 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2020-10-27 14:08:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:19,183 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-10-27 14:08:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:08:19,183 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 61 [2020-10-27 14:08:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:19,185 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:08:19,185 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:08:19,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=522, Invalid=4590, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:08:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:08:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-27 14:08:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:08:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-10-27 14:08:19,229 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 61 [2020-10-27 14:08:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:19,233 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-10-27 14:08:19,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 14:08:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-10-27 14:08:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:08:19,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:19,235 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:19,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:19,235 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:19,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:19,236 INFO L82 PathProgramCache]: Analyzing trace with hash 729202680, now seen corresponding path program 6 times [2020-10-27 14:08:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:19,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429532165] [2020-10-27 14:08:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:24,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:08:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:08:24,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:24,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:24,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:24,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:24,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:24,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:24,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:08:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429532165] [2020-10-27 14:08:24,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:24,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516218639] [2020-10-27 14:08:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:24,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:24,398 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 12 states. [2020-10-27 14:08:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:24,895 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2020-10-27 14:08:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:24,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-27 14:08:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:24,896 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:08:24,896 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 14:08:24,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 14:08:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-10-27 14:08:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:08:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-27 14:08:24,913 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 63 [2020-10-27 14:08:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:24,913 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-27 14:08:24,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-27 14:08:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:08:24,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:24,915 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:24,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:24,915 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:24,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1034332488, now seen corresponding path program 7 times [2020-10-27 14:08:24,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:24,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362013630] [2020-10-27 14:08:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:08:29,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:30,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:30,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:08:30,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362013630] [2020-10-27 14:08:30,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:30,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:30,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527067131] [2020-10-27 14:08:30,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:30,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:30,035 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 12 states. [2020-10-27 14:08:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:30,527 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-10-27 14:08:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:30,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-27 14:08:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:30,529 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:08:30,529 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:08:30,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:08:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:08:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 14:08:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:08:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-27 14:08:30,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 63 [2020-10-27 14:08:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:30,540 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-27 14:08:30,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-27 14:08:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:08:30,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:30,542 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:30,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:30,542 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1060796994, now seen corresponding path program 8 times [2020-10-27 14:08:30,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:30,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835138975] [2020-10-27 14:08:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:32,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:33,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:34,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5415 [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:35,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:08:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 14:08:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:38,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:38,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835138975] [2020-10-27 14:08:38,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:38,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:08:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423183651] [2020-10-27 14:08:38,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:08:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:08:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1791, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:08:38,697 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 44 states. [2020-10-27 14:08:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:43,255 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-27 14:08:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:08:43,255 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 73 [2020-10-27 14:08:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:43,257 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:08:43,257 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:08:43,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=270, Invalid=4560, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 14:08:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:08:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-27 14:08:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:08:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2020-10-27 14:08:43,274 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 73 [2020-10-27 14:08:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:43,274 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2020-10-27 14:08:43,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:08:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2020-10-27 14:08:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:08:43,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:43,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:43,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:43,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash -6957564, now seen corresponding path program 9 times [2020-10-27 14:08:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:43,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88639506] [2020-10-27 14:08:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:48,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:48,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:48,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:48,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:48,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:48,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:08:48,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88639506] [2020-10-27 14:08:48,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:48,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:48,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298548960] [2020-10-27 14:08:48,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:48,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:48,463 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand 14 states. [2020-10-27 14:08:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:49,568 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2020-10-27 14:08:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:08:49,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-27 14:08:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:49,574 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:08:49,574 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:08:49,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:08:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:08:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2020-10-27 14:08:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:08:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-27 14:08:49,602 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 75 [2020-10-27 14:08:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:49,602 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-27 14:08:49,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-27 14:08:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:08:49,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:49,603 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:49,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:08:49,604 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1950944964, now seen corresponding path program 10 times [2020-10-27 14:08:49,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:49,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448164370] [2020-10-27 14:08:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:53,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:54,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:08:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:54,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:54,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:54,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:54,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:54,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:08:54,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:08:54,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448164370] [2020-10-27 14:08:54,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:54,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:54,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201251642] [2020-10-27 14:08:54,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:54,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:54,820 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 14 states. [2020-10-27 14:08:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:55,384 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-10-27 14:08:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:55,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-27 14:08:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:55,387 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:08:55,388 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:08:55,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:08:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-10-27 14:08:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:08:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-27 14:08:55,399 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 75 [2020-10-27 14:08:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:55,400 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-27 14:08:55,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-27 14:08:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:08:55,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:55,401 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:55,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:08:55,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:55,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1787106802, now seen corresponding path program 11 times [2020-10-27 14:08:55,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:55,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927369667] [2020-10-27 14:08:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:00,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:09:00,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:09:00,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-27 14:09:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 14:09:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:02,726 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:09:02,919 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-27 14:09:03,121 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-27 14:09:04,673 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 14:09:04,896 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-27 14:09:05,119 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-27 14:09:05,650 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-27 14:09:05,867 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-10-27 14:09:06,087 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-27 14:09:06,307 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2020-10-27 14:09:06,532 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2020-10-27 14:09:07,333 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-10-27 14:09:07,542 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-10-27 14:09:07,984 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-27 14:09:10,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:10,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:10,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:10,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:10,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:10,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:10,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927369667] [2020-10-27 14:09:10,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:10,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 14:09:10,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624526578] [2020-10-27 14:09:10,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 14:09:10,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 14:09:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3715, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:09:10,593 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 64 states. [2020-10-27 14:09:10,952 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 14:09:11,945 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 67 [2020-10-27 14:09:12,241 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 39 [2020-10-27 14:09:12,537 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 40 [2020-10-27 14:09:13,213 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 104 [2020-10-27 14:09:13,773 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 104 [2020-10-27 14:09:14,303 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2020-10-27 14:09:14,637 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-27 14:09:15,027 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-10-27 14:09:15,329 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 34 [2020-10-27 14:09:15,812 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2020-10-27 14:09:16,236 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2020-10-27 14:09:16,545 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 47 [2020-10-27 14:09:16,940 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 43 [2020-10-27 14:09:17,412 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 65 [2020-10-27 14:09:18,538 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 26 [2020-10-27 14:09:18,799 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 27 [2020-10-27 14:09:19,067 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 29 [2020-10-27 14:09:19,294 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 33 [2020-10-27 14:09:19,549 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 14:09:20,000 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 56 [2020-10-27 14:09:20,437 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 70 [2020-10-27 14:09:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:23,422 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2020-10-27 14:09:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:09:23,422 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 85 [2020-10-27 14:09:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:23,424 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:09:23,424 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:09:23,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1142, Invalid=7978, Unknown=0, NotChecked=0, Total=9120 [2020-10-27 14:09:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:09:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 14:09:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:09:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-27 14:09:23,438 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 85 [2020-10-27 14:09:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:23,438 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-27 14:09:23,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 14:09:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-27 14:09:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:09:23,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:23,440 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:23,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:09:23,440 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash -896322992, now seen corresponding path program 12 times [2020-10-27 14:09:23,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:23,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948903459] [2020-10-27 14:09:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:23,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:28,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:28,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:28,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:09:28,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:28,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:28,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:09:28,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948903459] [2020-10-27 14:09:28,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:28,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:09:28,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264385981] [2020-10-27 14:09:28,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:09:28,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:28,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:09:28,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:09:28,668 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 16 states. [2020-10-27 14:09:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:29,595 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2020-10-27 14:09:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:09:29,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-27 14:09:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:29,597 INFO L225 Difference]: With dead ends: 153 [2020-10-27 14:09:29,597 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:09:29,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:09:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:09:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 14:09:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:09:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2020-10-27 14:09:29,609 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 87 [2020-10-27 14:09:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:29,609 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2020-10-27 14:09:29,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:09:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2020-10-27 14:09:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:09:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:29,610 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:29,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:09:29,610 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1819592742, now seen corresponding path program 13 times [2020-10-27 14:09:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:29,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625575427] [2020-10-27 14:09:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:29,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:09:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:34,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:34,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-27 14:09:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625575427] [2020-10-27 14:09:34,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:09:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:09:34,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568115557] [2020-10-27 14:09:34,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:09:34,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:34,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:09:34,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:09:34,693 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 4 states. [2020-10-27 14:09:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:34,801 INFO L93 Difference]: Finished difference Result 191 states and 203 transitions. [2020-10-27 14:09:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:09:34,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-27 14:09:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:34,803 INFO L225 Difference]: With dead ends: 191 [2020-10-27 14:09:34,803 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:09:34,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:09:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:09:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 14:09:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:09:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-27 14:09:34,815 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 97 [2020-10-27 14:09:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:34,815 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-27 14:09:34,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:09:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-27 14:09:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:09:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:34,817 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:34,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:09:34,817 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2004433700, now seen corresponding path program 1 times [2020-10-27 14:09:34,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:34,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629947993] [2020-10-27 14:09:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:09:39,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:09:39,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:39,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:39,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:39,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:39,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-27 14:09:39,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629947993] [2020-10-27 14:09:39,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:39,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:09:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724935795] [2020-10-27 14:09:39,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:09:39,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:09:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:09:39,909 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 5 states. [2020-10-27 14:09:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:40,039 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2020-10-27 14:09:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:09:40,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-27 14:09:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:40,041 INFO L225 Difference]: With dead ends: 192 [2020-10-27 14:09:40,041 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:09:40,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:09:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:09:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-27 14:09:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:09:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-10-27 14:09:40,056 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 99 [2020-10-27 14:09:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:40,057 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-10-27 14:09:40,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:09:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-10-27 14:09:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:09:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:40,058 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-27 14:09:40,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:09:40,058 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 752032094, now seen corresponding path program 2 times [2020-10-27 14:09:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:40,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901813248] [2020-10-27 14:09:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:40,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:41,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:41,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:44,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:45,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:09:45,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:09:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:09:45,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:09:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 14:09:45,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:45,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:45,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:45,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:09:45,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901813248] [2020-10-27 14:09:45,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:45,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:09:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44968510] [2020-10-27 14:09:45,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:09:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:09:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:09:45,241 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 13 states. [2020-10-27 14:09:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:45,517 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-27 14:09:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:09:45,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-27 14:09:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:45,519 INFO L225 Difference]: With dead ends: 195 [2020-10-27 14:09:45,519 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 14:09:45,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:09:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 14:09:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 14:09:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:09:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-27 14:09:45,532 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 101 [2020-10-27 14:09:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:45,533 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-27 14:09:45,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:09:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-27 14:09:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:09:45,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:45,534 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:45,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:09:45,534 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash -279161504, now seen corresponding path program 3 times [2020-10-27 14:09:45,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:45,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149662409] [2020-10-27 14:09:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:49,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:50,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:09:50,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:09:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:50,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:50,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-27 14:09:50,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149662409] [2020-10-27 14:09:50,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:50,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:09:50,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648390055] [2020-10-27 14:09:50,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:09:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:09:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:09:50,702 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 13 states. [2020-10-27 14:09:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:51,020 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-10-27 14:09:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:09:51,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-10-27 14:09:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:51,022 INFO L225 Difference]: With dead ends: 197 [2020-10-27 14:09:51,022 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:09:51,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:09:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:09:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 14:09:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 14:09:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-27 14:09:51,035 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 103 [2020-10-27 14:09:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:51,036 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-27 14:09:51,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:09:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-27 14:09:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:09:51,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:51,037 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:51,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:09:51,037 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 881236194, now seen corresponding path program 4 times [2020-10-27 14:09:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:51,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857285524] [2020-10-27 14:09:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:52,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:56,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:09:56,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:09:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:09:56,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:09:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:09:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:56,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:56,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:56,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:56,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-27 14:09:56,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857285524] [2020-10-27 14:09:56,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:56,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:09:56,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112037998] [2020-10-27 14:09:56,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:09:56,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:56,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:09:56,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:09:56,268 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 14 states. [2020-10-27 14:09:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:56,618 INFO L93 Difference]: Finished difference Result 199 states and 211 transitions. [2020-10-27 14:09:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:09:56,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-27 14:09:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:56,620 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:09:56,620 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:09:56,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:09:56,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:09:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 14:09:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:09:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-27 14:09:56,633 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 105 [2020-10-27 14:09:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:56,634 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-27 14:09:56,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:09:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-27 14:09:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 14:09:56,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:56,635 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:56,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:09:56,635 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash -668072988, now seen corresponding path program 5 times [2020-10-27 14:09:56,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:56,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079624699] [2020-10-27 14:09:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:58,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:10:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:01,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:01,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:01,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:01,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:10:01,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:01,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:10:01,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079624699] [2020-10-27 14:10:01,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:01,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:01,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985906141] [2020-10-27 14:10:01,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:01,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:01,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:01,876 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 16 states. [2020-10-27 14:10:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:02,313 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-27 14:10:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:10:02,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-10-27 14:10:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:02,315 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:10:02,316 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:10:02,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:10:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:10:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 14:10:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:10:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-10-27 14:10:02,329 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 107 [2020-10-27 14:10:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:02,329 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-10-27 14:10:02,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-10-27 14:10:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:10:02,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:02,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:02,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:10:02,331 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 799454822, now seen corresponding path program 6 times [2020-10-27 14:10:02,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:02,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675885725] [2020-10-27 14:10:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:02,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6400 [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-27 14:10:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 14:10:08,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:16,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:16,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:16,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:16,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:16,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:16,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:10:16,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675885725] [2020-10-27 14:10:16,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:16,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 14:10:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930588403] [2020-10-27 14:10:16,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 14:10:16,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 14:10:16,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3865, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:10:16,763 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 64 states. [2020-10-27 14:10:17,347 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 14:10:17,690 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:10:18,066 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:10:18,423 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:10:18,802 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:10:19,597 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-27 14:10:20,221 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 14:10:20,687 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-27 14:10:21,077 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:10:21,476 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:10:21,839 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:10:22,223 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:23,241 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-27 14:10:23,860 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 14:10:24,478 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-27 14:10:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:28,796 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-10-27 14:10:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:10:28,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 109 [2020-10-27 14:10:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:28,799 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:10:28,799 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 14:10:28,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=344, Invalid=7312, Unknown=0, NotChecked=0, Total=7656 [2020-10-27 14:10:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 14:10:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2020-10-27 14:10:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 14:10:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2020-10-27 14:10:28,820 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 109 [2020-10-27 14:10:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:28,820 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2020-10-27 14:10:28,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 14:10:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2020-10-27 14:10:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:10:28,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:28,821 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:28,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:10:28,822 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1796712152, now seen corresponding path program 7 times [2020-10-27 14:10:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:28,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890353353] [2020-10-27 14:10:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:29,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:29,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:30,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:33,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:33,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:10:33,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:10:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:10:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890353353] [2020-10-27 14:10:34,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:34,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:10:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475659890] [2020-10-27 14:10:34,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:10:34,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:10:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:10:34,109 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand 18 states. [2020-10-27 14:10:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:35,523 INFO L93 Difference]: Finished difference Result 254 states and 273 transitions. [2020-10-27 14:10:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:10:35,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 111 [2020-10-27 14:10:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:35,528 INFO L225 Difference]: With dead ends: 254 [2020-10-27 14:10:35,528 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:10:35,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:10:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:10:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 165. [2020-10-27 14:10:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:10:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2020-10-27 14:10:35,547 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 111 [2020-10-27 14:10:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:35,548 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2020-10-27 14:10:35,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:10:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2020-10-27 14:10:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:10:35,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:35,549 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:35,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:10:35,549 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -90779160, now seen corresponding path program 8 times [2020-10-27 14:10:35,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:35,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199763193] [2020-10-27 14:10:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:35,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:40,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:10:40,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:40,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:40,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:40,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:10:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199763193] [2020-10-27 14:10:40,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:40,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:10:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162996722] [2020-10-27 14:10:40,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:10:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:10:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:10:40,856 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand 18 states. [2020-10-27 14:10:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:41,859 INFO L93 Difference]: Finished difference Result 270 states and 285 transitions. [2020-10-27 14:10:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:10:41,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 111 [2020-10-27 14:10:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:41,861 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:10:41,861 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:10:41,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:10:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:10:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2020-10-27 14:10:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 14:10:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2020-10-27 14:10:41,878 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 111 [2020-10-27 14:10:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:41,879 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2020-10-27 14:10:41,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:10:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2020-10-27 14:10:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:10:41,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:41,880 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:41,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:10:41,880 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -429887438, now seen corresponding path program 9 times [2020-10-27 14:10:41,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:41,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569720370] [2020-10-27 14:10:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:42,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:46,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:46,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 14:10:46,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:10:46,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:47,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-27 14:10:47,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569720370] [2020-10-27 14:10:47,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:47,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:10:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609790234] [2020-10-27 14:10:47,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:10:47,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:10:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:10:47,206 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand 18 states. [2020-10-27 14:10:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:47,758 INFO L93 Difference]: Finished difference Result 227 states and 239 transitions. [2020-10-27 14:10:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:10:47,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-10-27 14:10:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:47,760 INFO L225 Difference]: With dead ends: 227 [2020-10-27 14:10:47,760 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:10:47,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:10:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:10:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 14:10:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 14:10:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-27 14:10:47,773 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 121 [2020-10-27 14:10:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:47,773 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-27 14:10:47,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:10:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-27 14:10:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:10:47,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:47,774 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:47,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:10:47,774 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -47868108, now seen corresponding path program 10 times [2020-10-27 14:10:47,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:47,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226501692] [2020-10-27 14:10:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:47,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5278 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 97 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 14:10:53,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:54,043 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-10-27 14:10:56,072 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-27 14:10:56,278 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 14:10:56,491 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-27 14:10:56,786 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-27 14:10:57,039 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-27 14:10:57,891 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 14:10:59,568 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-27 14:11:00,850 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-27 14:11:01,147 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-27 14:11:01,468 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-27 14:11:02,102 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-27 14:11:02,499 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-27 14:11:02,869 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-27 14:11:03,248 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-27 14:11:03,649 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-27 14:11:04,038 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-27 14:11:04,416 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-27 14:11:04,790 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-27 14:11:05,109 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 14:11:05,419 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-27 14:11:05,703 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-27 14:11:06,230 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:11:06,632 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-27 14:11:07,027 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-27 14:11:07,422 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-27 14:11:07,823 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-27 14:11:08,224 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-27 14:11:08,600 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-27 14:11:08,979 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-27 14:11:09,369 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-27 14:11:09,775 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-27 14:11:10,151 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-27 14:11:10,526 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 14:11:10,885 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-27 14:11:15,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:15,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:15,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:15,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0