/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:47:15,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:47:15,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:47:15,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:47:15,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:47:15,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:47:15,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:47:15,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:47:15,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:47:15,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:47:15,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:47:15,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:47:15,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:47:15,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:47:15,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:47:15,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:47:15,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:47:15,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:47:15,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:47:15,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:47:15,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:47:15,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:47:15,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:47:15,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:47:15,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:47:15,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:47:15,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:47:15,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:47:15,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:47:15,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:47:15,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:47:15,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:47:15,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:47:15,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:47:15,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:47:15,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:47:15,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:47:15,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:47:15,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:47:15,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:47:15,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:47:15,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:47:15,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:47:15,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:47:15,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:47:15,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:47:15,793 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:47:15,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:47:15,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:47:15,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:47:15,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:47:15,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:47:15,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:47:15,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:47:15,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:47:15,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:47:15,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:47:15,795 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:47:15,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:47:15,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:47:15,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:47:15,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:47:15,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:47:15,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:15,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:47:15,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:47:15,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:47:15,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:47:15,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:47:15,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:47:15,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:47:15,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:47:16,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:47:16,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:47:16,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:47:16,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:47:16,270 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:47:16,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-28 08:47:16,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fa73d6e/dded7d65fcf9429d888fbec5437bcaf3/FLAG98c5a0a4a [2020-10-28 08:47:17,007 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:47:17,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-28 08:47:17,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fa73d6e/dded7d65fcf9429d888fbec5437bcaf3/FLAG98c5a0a4a [2020-10-28 08:47:17,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fa73d6e/dded7d65fcf9429d888fbec5437bcaf3 [2020-10-28 08:47:17,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:47:17,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:47:17,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:17,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:47:17,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:47:17,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d288e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17, skipping insertion in model container [2020-10-28 08:47:17,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:47:17,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:47:17,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:17,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:47:17,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:17,701 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:47:17,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17 WrapperNode [2020-10-28 08:47:17,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:17,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:47:17,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:47:17,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:47:17,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:47:17,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:47:17,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:47:17,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:47:17,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:17,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:47:17,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:47:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:47:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:47:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:47:17,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:47:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:47:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:47:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:47:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:47:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:47:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:47:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-28 08:47:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:47:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:47:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:47:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:47:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:47:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:47:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:47:18,403 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:47:18,404 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:47:18,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:18 BoogieIcfgContainer [2020-10-28 08:47:18,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:47:18,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:47:18,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:47:18,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:47:18,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:17" (1/3) ... [2020-10-28 08:47:18,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69413fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:18, skipping insertion in model container [2020-10-28 08:47:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17" (2/3) ... [2020-10-28 08:47:18,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69413fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:18, skipping insertion in model container [2020-10-28 08:47:18,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:18" (3/3) ... [2020-10-28 08:47:18,420 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2020-10-28 08:47:18,433 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:47:18,438 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:47:18,453 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:47:18,485 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:47:18,485 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:47:18,485 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:47:18,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:47:18,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:47:18,486 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:47:18,486 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:47:18,486 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:47:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 08:47:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:47:18,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:18,513 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] [2020-10-28 08:47:18,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash 994645046, now seen corresponding path program 1 times [2020-10-28 08:47:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074188376] [2020-10-28 08:47:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:18,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:19,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:47:19,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:19,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-28 08:47:19,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:19,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:47:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:19,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:47:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:20,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:20,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:20,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:20,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:20,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074188376] [2020-10-28 08:47:20,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:20,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:47:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776682208] [2020-10-28 08:47:20,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:47:20,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:47:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:20,105 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 08:47:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:20,290 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-28 08:47:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:47:20,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:47:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:20,301 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:47:20,302 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:47:20,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:47:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:47:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:47:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-28 08:47:20,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-28 08:47:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:20,353 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-28 08:47:20,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:47:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-28 08:47:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:47:20,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:20,355 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] [2020-10-28 08:47:20,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:47:20,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1044057278, now seen corresponding path program 1 times [2020-10-28 08:47:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:20,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343702820] [2020-10-28 08:47:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:21,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:47:21,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-28 08:47:21,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:21,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:47:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:21,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:21,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:21,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:21,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:21,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343702820] [2020-10-28 08:47:21,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:21,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:47:21,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131151688] [2020-10-28 08:47:21,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:21,455 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-10-28 08:47:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:21,730 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-28 08:47:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:47:21,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 08:47:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:21,733 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:47:21,733 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:47:21,735 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 [2020-10-28 08:47:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:47:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-28 08:47:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:47:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 08:47:21,745 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2020-10-28 08:47:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:21,745 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 08:47:21,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 08:47:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:47:21,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:21,747 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] [2020-10-28 08:47:21,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:47:21,747 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1372549430, now seen corresponding path program 1 times [2020-10-28 08:47:21,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969172219] [2020-10-28 08:47:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:23,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:24,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:26,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:26,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:47:26,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:47:26,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:47:26,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:26,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:47:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:26,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:47:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:26,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:26,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:26,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:26,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:26,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:26,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:26,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:26,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969172219] [2020-10-28 08:47:26,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:26,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:47:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396214809] [2020-10-28 08:47:26,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:47:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:47:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:26,920 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-28 08:47:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:27,087 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 08:47:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:47:27,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 08:47:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:27,090 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:47:27,090 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:47:27,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:47:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:47:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:47:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 08:47:27,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2020-10-28 08:47:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:27,113 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 08:47:27,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:47:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 08:47:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:47:27,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:27,116 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] [2020-10-28 08:47:27,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:47:27,117 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1458252852, now seen corresponding path program 1 times [2020-10-28 08:47:27,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:27,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641542930] [2020-10-28 08:47:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:27,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:27,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:32,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:32,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:47:32,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:47:32,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:47:32,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:32,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:47:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:32,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:47:32,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:32,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:32,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:32,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:47:32,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:32,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:32,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:32,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:32,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:32,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:32,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641542930] [2020-10-28 08:47:32,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:32,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:47:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988347175] [2020-10-28 08:47:32,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:47:32,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:47:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:32,277 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-28 08:47:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:32,562 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-28 08:47:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:47:32,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 08:47:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:32,564 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:47:32,564 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 08:47:32,565 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 [2020-10-28 08:47:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 08:47:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 08:47:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:47:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 08:47:32,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-10-28 08:47:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:32,574 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 08:47:32,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:47:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 08:47:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:47:32,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:32,576 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:32,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:47:32,577 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1341725356, now seen corresponding path program 2 times [2020-10-28 08:47:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:32,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109861756] [2020-10-28 08:47:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:37,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:47:37,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 08:47:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:47:37,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:37,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:37,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:37,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:37,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:37,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:37,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:47:37,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109861756] [2020-10-28 08:47:37,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:37,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:47:37,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8708434] [2020-10-28 08:47:37,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:37,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:37,722 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-28 08:47:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:37,899 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-28 08:47:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:47:37,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-28 08:47:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:37,901 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:47:37,901 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:47:37,902 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 [2020-10-28 08:47:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:47:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:47:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:47:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 08:47:37,910 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2020-10-28 08:47:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:37,910 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 08:47:37,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 08:47:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:47:37,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:37,912 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:37,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:47:37,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 736251862, now seen corresponding path program 3 times [2020-10-28 08:47:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:37,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136824171] [2020-10-28 08:47:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:38,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:43,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:43,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:47:43,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:47:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 08:47:43,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:43,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:43,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:47:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:47:43,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:43,477 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-28 08:47:44,358 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-28 08:47:44,595 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-28 08:47:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:45,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:45,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:45,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:45,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:45,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:45,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:45,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136824171] [2020-10-28 08:47:45,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:45,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:47:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034880673] [2020-10-28 08:47:45,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:47:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:47:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:47:45,742 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 25 states. [2020-10-28 08:47:46,285 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-28 08:47:46,662 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 08:47:47,032 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-28 08:47:47,278 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-28 08:47:47,695 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-28 08:47:47,935 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-28 08:47:48,114 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-10-28 08:47:48,704 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-28 08:47:49,077 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-28 08:47:49,624 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-28 08:47:50,009 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-28 08:47:50,517 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-28 08:47:50,835 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 08:47:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:51,422 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-28 08:47:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:47:51,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-28 08:47:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:51,425 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:47:51,425 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:47:51,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 08:47:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:47:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-28 08:47:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 08:47:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-28 08:47:51,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-28 08:47:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:51,439 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-28 08:47:51,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:47:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-28 08:47:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:47:51,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:51,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 08:47:51,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:47:51,441 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1812493672, now seen corresponding path program 4 times [2020-10-28 08:47:51,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:51,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409692553] [2020-10-28 08:47:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:56,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:47:56,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:47:56,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:47:56,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:56,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:56,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:47:56,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:56,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:47:56,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:56,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:56,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:56,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:56,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:47:56,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:56,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:56,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:47:56,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409692553] [2020-10-28 08:47:56,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:56,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:47:56,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525221983] [2020-10-28 08:47:56,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:47:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:47:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:47:56,687 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-28 08:47:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:57,255 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-28 08:47:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:47:57,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 08:47:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:57,258 INFO L225 Difference]: With dead ends: 112 [2020-10-28 08:47:57,258 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:47:57,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:47:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:47:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-28 08:47:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 08:47:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-28 08:47:57,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 43 [2020-10-28 08:47:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:57,283 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-28 08:47:57,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:47:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-28 08:47:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:47:57,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:57,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-28 08:47:57,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:47:57,292 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2026511334, now seen corresponding path program 5 times [2020-10-28 08:47:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:57,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26530331] [2020-10-28 08:47:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:02,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:48:02,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:48:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:02,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:48:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:02,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:02,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:02,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:02,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:02,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:02,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:02,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:02,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 08:48:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26530331] [2020-10-28 08:48:02,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:02,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789631002] [2020-10-28 08:48:02,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:02,509 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-10-28 08:48:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:02,997 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-28 08:48:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:48:02,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 08:48:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:02,999 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:48:02,999 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:48:03,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:48:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:48:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 08:48:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:48:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 08:48:03,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-28 08:48:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:03,010 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 08:48:03,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 08:48:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:48:03,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:03,011 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:48:03,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:48:03,012 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash -491190432, now seen corresponding path program 6 times [2020-10-28 08:48:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:03,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310314836] [2020-10-28 08:48:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:03,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:03,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:05,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:06,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:08,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:48:08,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:48:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5258 [2020-10-28 08:48:08,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:08,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:48:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:48:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:11,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:11,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:11,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:11,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:11,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:11,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:48:11,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:11,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:11,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:11,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:11,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:11,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:48:11,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310314836] [2020-10-28 08:48:11,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:11,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:48:11,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534434992] [2020-10-28 08:48:11,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:48:11,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:48:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:48:11,259 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 32 states. [2020-10-28 08:48:11,708 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-28 08:48:12,018 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-28 08:48:12,597 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 08:48:12,825 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-28 08:48:13,155 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-28 08:48:13,498 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:48:13,858 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-28 08:48:14,168 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-28 08:48:14,641 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-28 08:48:15,052 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-28 08:48:15,426 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-28 08:48:15,713 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-28 08:48:16,184 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-28 08:48:16,577 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-28 08:48:16,891 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-28 08:48:17,179 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-28 08:48:17,631 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-28 08:48:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:18,135 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-28 08:48:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:48:18,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 51 [2020-10-28 08:48:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:18,138 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:48:18,138 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 08:48:18,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=199, Invalid=2453, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 08:48:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 08:48:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-28 08:48:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 08:48:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-28 08:48:18,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 51 [2020-10-28 08:48:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:18,155 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-28 08:48:18,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:48:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-28 08:48:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:48:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:18,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-28 08:48:18,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:48:18,157 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:18,158 INFO L82 PathProgramCache]: Analyzing trace with hash 521377698, now seen corresponding path program 7 times [2020-10-28 08:48:18,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:18,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805629820] [2020-10-28 08:48:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:18,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:19,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:23,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:23,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:48:23,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:23,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:23,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:48:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805629820] [2020-10-28 08:48:23,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:23,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:23,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475360563] [2020-10-28 08:48:23,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:23,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:23,430 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 12 states. [2020-10-28 08:48:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:24,166 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-28 08:48:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:48:24,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-28 08:48:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:24,168 INFO L225 Difference]: With dead ends: 140 [2020-10-28 08:48:24,168 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:48:24,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:48:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-28 08:48:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 08:48:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-28 08:48:24,181 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 53 [2020-10-28 08:48:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:24,182 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-28 08:48:24,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-28 08:48:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:48:24,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:24,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-28 08:48:24,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:48:24,184 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1155959132, now seen corresponding path program 8 times [2020-10-28 08:48:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:24,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841753994] [2020-10-28 08:48:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:29,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:29,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:48:29,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:29,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:29,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:29,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 08:48:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841753994] [2020-10-28 08:48:29,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:29,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739803971] [2020-10-28 08:48:29,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:29,448 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 12 states. [2020-10-28 08:48:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:30,095 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-28 08:48:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:48:30,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-28 08:48:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:30,098 INFO L225 Difference]: With dead ends: 105 [2020-10-28 08:48:30,098 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:48:30,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:48:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 08:48:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:48:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-28 08:48:30,110 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-28 08:48:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:30,110 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-28 08:48:30,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-28 08:48:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:48:30,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:30,116 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:48:30,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:48:30,116 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash 370973290, now seen corresponding path program 9 times [2020-10-28 08:48:30,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:30,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728403210] [2020-10-28 08:48:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:31,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:34,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:35,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:35,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:48:35,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:48:35,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 08:48:35,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:35,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 08:48:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 08:48:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:36,315 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-28 08:48:36,541 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-28 08:48:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:39,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:39,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:39,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:39,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:39,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:39,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:39,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:48:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728403210] [2020-10-28 08:48:39,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:39,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 08:48:39,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104315803] [2020-10-28 08:48:39,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 08:48:39,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 08:48:39,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:48:39,576 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 39 states. [2020-10-28 08:48:40,209 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:48:40,597 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:48:41,010 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:48:41,333 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-28 08:48:41,998 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2020-10-28 08:48:42,317 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-28 08:48:43,261 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-28 08:48:43,580 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:48:44,047 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-28 08:48:44,657 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-28 08:48:44,991 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:48:45,841 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-28 08:48:46,794 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-28 08:48:47,626 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-28 08:48:48,035 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:48:48,471 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:48:48,902 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:48:49,238 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-28 08:48:49,884 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-28 08:48:50,315 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 08:48:50,734 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-28 08:48:51,133 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-28 08:48:51,775 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-28 08:48:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:52,418 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-28 08:48:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 08:48:52,420 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 61 [2020-10-28 08:48:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:52,423 INFO L225 Difference]: With dead ends: 113 [2020-10-28 08:48:52,423 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 08:48:52,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=269, Invalid=3891, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 08:48:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 08:48:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-10-28 08:48:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 08:48:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-28 08:48:52,444 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2020-10-28 08:48:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:52,445 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-28 08:48:52,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 08:48:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-28 08:48:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:48:52,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:52,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-28 08:48:52,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:48:52,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash -974151636, now seen corresponding path program 10 times [2020-10-28 08:48:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188779221] [2020-10-28 08:48:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:52,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:52,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:57,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:57,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:48:57,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:48:57,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:48:57,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:57,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:57,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:48:57,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:57,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:48:57,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:57,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:57,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:57,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:57,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 08:48:57,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188779221] [2020-10-28 08:48:57,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:57,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:48:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013552165] [2020-10-28 08:48:57,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:48:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:48:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:57,764 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 14 states. [2020-10-28 08:48:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:58,711 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-10-28 08:48:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:48:58,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-28 08:48:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:58,714 INFO L225 Difference]: With dead ends: 168 [2020-10-28 08:48:58,714 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 08:48:58,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:48:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 08:48:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-28 08:48:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:48:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-10-28 08:48:58,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 63 [2020-10-28 08:48:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:58,727 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-10-28 08:48:58,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:48:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-10-28 08:48:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:48:58,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:58,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-28 08:48:58,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:48:58,728 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1093936302, now seen corresponding path program 11 times [2020-10-28 08:48:58,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:58,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139736073] [2020-10-28 08:48:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:03,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:03,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:49:03,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:49:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:04,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:04,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:04,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:04,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:04,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:04,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:49:04,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:04,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:04,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:04,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:04,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:49:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 08:49:04,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139736073] [2020-10-28 08:49:04,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:04,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:49:04,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053559210] [2020-10-28 08:49:04,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:49:04,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:04,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:49:04,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:49:04,103 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 14 states. [2020-10-28 08:49:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:04,975 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-28 08:49:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:49:04,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-28 08:49:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:04,977 INFO L225 Difference]: With dead ends: 123 [2020-10-28 08:49:04,977 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 08:49:04,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:49:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 08:49:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 08:49:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:49:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 08:49:04,989 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2020-10-28 08:49:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:04,990 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 08:49:04,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:49:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 08:49:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:49:04,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:04,993 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:49:04,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:49:04,994 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:04,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1467438860, now seen corresponding path program 12 times [2020-10-28 08:49:04,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:04,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386489723] [2020-10-28 08:49:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:05,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:05,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:07,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:08,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:09,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:10,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:10,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:49:10,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:49:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:49:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:10,655 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-28 08:49:10,845 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-28 08:49:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:49:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386489723] [2020-10-28 08:49:15,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:15,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 08:49:15,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559791003] [2020-10-28 08:49:15,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 08:49:15,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:15,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 08:49:15,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1974, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:49:15,999 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 46 states. [2020-10-28 08:49:18,983 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2020-10-28 08:49:20,094 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-28 08:49:22,337 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-28 08:49:25,075 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-28 08:49:27,756 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-28 08:49:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:28,614 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-28 08:49:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 08:49:28,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 71 [2020-10-28 08:49:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:28,618 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:49:28,618 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:49:28,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=292, Invalid=5110, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 08:49:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:49:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-28 08:49:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 08:49:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-28 08:49:28,632 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 71 [2020-10-28 08:49:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:28,632 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-28 08:49:28,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 08:49:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-28 08:49:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:49:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:28,634 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-28 08:49:28,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:49:28,634 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -341883850, now seen corresponding path program 13 times [2020-10-28 08:49:28,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:28,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087961720] [2020-10-28 08:49:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:28,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:28,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:33,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:49:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:34,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:34,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:34,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:34,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:49:34,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:34,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:34,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:34,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:34,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:49:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 08:49:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087961720] [2020-10-28 08:49:34,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:34,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:49:34,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20876211] [2020-10-28 08:49:34,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:49:34,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:49:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:49:34,231 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 16 states. [2020-10-28 08:49:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:35,631 INFO L93 Difference]: Finished difference Result 196 states and 210 transitions. [2020-10-28 08:49:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:49:35,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 08:49:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:35,637 INFO L225 Difference]: With dead ends: 196 [2020-10-28 08:49:35,637 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 08:49:35,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:49:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 08:49:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-28 08:49:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 08:49:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-28 08:49:35,658 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 73 [2020-10-28 08:49:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:35,658 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-28 08:49:35,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:49:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-28 08:49:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:49:35,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:35,659 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-28 08:49:35,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:49:35,660 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1439592904, now seen corresponding path program 14 times [2020-10-28 08:49:35,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:35,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899681196] [2020-10-28 08:49:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:35,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:35,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:37,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:40,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 08:49:40,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:41,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:41,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:41,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:49:41,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:41,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:41,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 08:49:41,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899681196] [2020-10-28 08:49:41,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:41,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:49:41,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136924438] [2020-10-28 08:49:41,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:49:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:49:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:49:41,152 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 16 states. [2020-10-28 08:49:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:42,287 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-28 08:49:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:49:42,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-28 08:49:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:42,290 INFO L225 Difference]: With dead ends: 141 [2020-10-28 08:49:42,290 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:49:42,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:49:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:49:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 08:49:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:49:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 08:49:42,304 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-10-28 08:49:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:42,304 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 08:49:42,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:49:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 08:49:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:49:42,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:42,305 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:49:42,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:49:42,306 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2140089602, now seen corresponding path program 15 times [2020-10-28 08:49:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:42,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640696706] [2020-10-28 08:49:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:42,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:45,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:47,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5557 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 08:49:47,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:50,184 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-28 08:49:50,605 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-28 08:49:50,856 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 08:49:51,125 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-28 08:49:51,398 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-28 08:49:51,656 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 08:49:51,924 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-28 08:49:52,219 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-28 08:49:52,525 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 08:49:52,787 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-28 08:49:53,057 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-28 08:49:53,321 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-28 08:49:53,589 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-28 08:49:53,916 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 08:49:54,237 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 08:49:54,546 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-28 08:49:54,849 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-28 08:49:55,173 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 08:49:55,482 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-28 08:49:55,809 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-28 08:49:56,136 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-28 08:49:56,468 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 08:49:56,780 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-28 08:49:57,124 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-28 08:49:57,503 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-28 08:49:57,847 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-28 08:49:58,320 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-28 08:49:58,742 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-28 08:49:59,062 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-28 08:49:59,392 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-28 08:49:59,728 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-28 08:50:00,072 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-28 08:50:01,376 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-10-28 08:50:02,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:02,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:02,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:02,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:02,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:50:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640696706] [2020-10-28 08:50:02,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:02,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 08:50:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794542109] [2020-10-28 08:50:02,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 08:50:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 08:50:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 08:50:02,649 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-28 08:50:03,473 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 36 [2020-10-28 08:50:04,970 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:50:05,515 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:50:07,024 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-28 08:50:07,625 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-28 08:50:08,281 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-28 08:50:08,894 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-28 08:50:09,760 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-28 08:50:10,493 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 08:50:10,995 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 08:50:11,799 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-28 08:50:12,447 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-28 08:50:12,959 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 08:50:13,891 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-28 08:50:14,370 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 08:50:15,108 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-28 08:50:15,589 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-28 08:50:16,533 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-28 08:50:17,266 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-10-28 08:50:17,957 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-10-28 08:50:18,765 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2020-10-28 08:50:19,117 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 08:50:19,981 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-28 08:50:20,400 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 08:50:20,990 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-28 08:50:21,527 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-28 08:50:21,956 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 08:50:22,456 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-28 08:50:22,862 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 08:50:23,314 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-28 08:50:24,125 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-28 08:50:24,574 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-28 08:50:25,178 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-28 08:50:25,654 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-28 08:50:26,295 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-28 08:50:27,353 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2020-10-28 08:50:27,980 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-28 08:50:28,707 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-28 08:50:29,192 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:50:29,897 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-28 08:50:30,610 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-28 08:50:31,244 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-28 08:50:32,119 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-10-28 08:50:32,894 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 66 [2020-10-28 08:50:33,536 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2020-10-28 08:50:34,525 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-28 08:50:35,245 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-10-28 08:50:36,228 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-28 08:50:37,050 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-10-28 08:50:37,667 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 08:50:38,353 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-28 08:50:38,816 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 08:50:39,365 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 08:50:39,902 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-28 08:50:41,216 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2020-10-28 08:50:41,713 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2020-10-28 08:50:42,213 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-28 08:50:42,901 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-28 08:50:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:44,512 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-28 08:50:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-28 08:50:44,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-28 08:50:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:44,517 INFO L225 Difference]: With dead ends: 189 [2020-10-28 08:50:44,517 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:50:44,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3885 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=1721, Invalid=14029, Unknown=0, NotChecked=0, Total=15750 [2020-10-28 08:50:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:50:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2020-10-28 08:50:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 08:50:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2020-10-28 08:50:44,537 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 81 [2020-10-28 08:50:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:44,537 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2020-10-28 08:50:44,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 08:50:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2020-10-28 08:50:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:50:44,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:44,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-28 08:50:44,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:50:44,539 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1725029440, now seen corresponding path program 16 times [2020-10-28 08:50:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:44,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94845789] [2020-10-28 08:50:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:44,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:44,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:47,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:49,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:50:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:50:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:50:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:50,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:50,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:50,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:50:50,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:50,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:50,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:50,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:50:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:50:50,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94845789] [2020-10-28 08:50:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:50:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31863115] [2020-10-28 08:50:50,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:50:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:50:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:50:50,228 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand 18 states. [2020-10-28 08:50:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:52,014 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-10-28 08:50:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:50:52,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-28 08:50:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:52,018 INFO L225 Difference]: With dead ends: 177 [2020-10-28 08:50:52,018 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:50:52,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:50:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:50:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 08:50:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:50:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-28 08:50:52,038 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 83 [2020-10-28 08:50:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:52,038 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-28 08:50:52,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:50:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-28 08:50:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:50:52,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:52,039 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-28 08:50:52,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:50:52,040 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:52,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2107767552, now seen corresponding path program 17 times [2020-10-28 08:50:52,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:52,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263508069] [2020-10-28 08:50:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:52,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:54,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:57,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:50:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:50:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:50:57,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:57,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:57,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:57,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:57,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:57,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:57,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:50:57,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263508069] [2020-10-28 08:50:57,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:57,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:50:57,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108088086] [2020-10-28 08:50:57,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:50:57,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:50:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:50:57,629 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 18 states.