/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-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:27:55,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:27:55,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:27:55,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:27:55,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:27:55,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:27:55,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:27:55,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:27:55,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:27:55,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:27:55,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:27:55,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:27:55,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:27:55,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:27:55,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:27:55,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:27:55,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:27:55,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:27:55,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:27:55,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:27:55,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:27:55,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:27:55,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:27:55,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:27:55,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:27:55,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:27:55,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:27:55,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:27:55,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:27:55,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:27:55,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:27:55,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:27:55,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:27:55,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:27:55,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:27:55,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:27:55,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:27:55,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:27:55,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:27:55,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:27:55,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:27:55,555 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 09:27:55,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:27:55,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:27:55,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:27:55,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:27:55,584 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:27:55,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:27:55,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:27:55,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:27:55,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:27:55,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:27:55,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:27:55,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:27:55,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:27:55,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:27:55,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:27:55,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:27:55,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:27:55,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:27:55,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:27:55,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:27:55,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:27:55,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:27:55,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:27:55,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:27:55,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:27:56,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:27:56,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:27:56,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:27:56,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:27:56,061 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:27:56,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-28 09:27:56,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b859cd799/fa7d689a67984cd7a448115cafa433ab/FLAGe42883863 [2020-10-28 09:27:56,888 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:27:56,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-28 09:27:56,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b859cd799/fa7d689a67984cd7a448115cafa433ab/FLAGe42883863 [2020-10-28 09:27:57,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b859cd799/fa7d689a67984cd7a448115cafa433ab [2020-10-28 09:27:57,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:27:57,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:27:57,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:27:57,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:27:57,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:27:57,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff664bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57, skipping insertion in model container [2020-10-28 09:27:57,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:27:57,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:27:57,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:27:57,505 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:27:57,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:27:57,602 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:27:57,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57 WrapperNode [2020-10-28 09:27:57,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:27:57,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:27:57,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:27:57,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:27:57,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (1/1) ... [2020-10-28 09:27:57,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:27:57,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:27:57,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:27:57,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:27:57,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (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 09:27:57,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:27:57,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:27:57,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:27:57,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:27:57,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:27:57,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:27:57,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:27:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:27:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:27:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:27:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:27:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:27:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:27:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:27:57,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:27:57,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:27:57,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:27:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:27:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:27:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:27:58,733 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:27:58,733 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 09:27:58,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:27:58 BoogieIcfgContainer [2020-10-28 09:27:58,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:27:58,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:27:58,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:27:58,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:27:58,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:27:57" (1/3) ... [2020-10-28 09:27:58,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bce8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:27:58, skipping insertion in model container [2020-10-28 09:27:58,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:27:57" (2/3) ... [2020-10-28 09:27:58,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bce8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:27:58, skipping insertion in model container [2020-10-28 09:27:58,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:27:58" (3/3) ... [2020-10-28 09:27:58,745 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2020-10-28 09:27:58,759 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:27:58,765 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:27:58,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:27:58,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:27:58,810 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:27:58,810 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:27:58,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:27:58,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:27:58,811 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:27:58,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:27:58,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:27:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-28 09:27:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:27:58,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:58,840 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 09:27:58,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1162609913, now seen corresponding path program 1 times [2020-10-28 09:27:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:58,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653530013] [2020-10-28 09:27:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:59,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:59,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:27:59,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:27:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 09:27:59,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:59,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:27:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:59,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:27:59,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:00,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:00,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:00,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:28:00,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:00,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:00,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:00,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:00,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:00,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:28:00,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:00,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:00,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:00,037 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 09:28:00,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653530013] [2020-10-28 09:28:00,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:00,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:28:00,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773798339] [2020-10-28 09:28:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:28:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:28:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:28:00,065 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-10-28 09:28:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:00,336 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2020-10-28 09:28:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:28:00,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-28 09:28:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:00,347 INFO L225 Difference]: With dead ends: 106 [2020-10-28 09:28:00,348 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:28:00,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:28:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:28:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 09:28:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:28:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-28 09:28:00,404 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 31 [2020-10-28 09:28:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:00,405 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-28 09:28:00,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:28:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-28 09:28:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:28:00,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:00,407 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 09:28:00,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:28:00,408 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -144494776, now seen corresponding path program 1 times [2020-10-28 09:28:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:00,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827432113] [2020-10-28 09:28:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:00,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:03,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:05,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:28:05,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 09:28:05,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:28:05,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:05,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:05,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:28:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:28:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:28:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:28:05,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:05,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:05,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:05,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:05,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:05,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:05,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:05,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:05,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:05,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:05,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 09:28:05,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:05,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:05,633 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 09:28:05,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827432113] [2020-10-28 09:28:05,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:05,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 09:28:05,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893711493] [2020-10-28 09:28:05,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:28:05,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:28:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:28:05,638 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 7 states. [2020-10-28 09:28:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:06,400 INFO L93 Difference]: Finished difference Result 118 states and 154 transitions. [2020-10-28 09:28:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:28:06,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-28 09:28:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:06,405 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:28:06,405 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:28:06,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:28:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:28:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-28 09:28:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:28:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-28 09:28:06,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 31 [2020-10-28 09:28:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:06,426 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-28 09:28:06,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:28:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-28 09:28:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:28:06,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:06,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:06,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:28:06,429 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1001680341, now seen corresponding path program 1 times [2020-10-28 09:28:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:06,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705375200] [2020-10-28 09:28:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:06,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:06,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:28:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:28:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-28 09:28:07,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:28:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:28:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:07,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:07,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:07,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:07,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:07,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:07,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:28:07,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705375200] [2020-10-28 09:28:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:07,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:28:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788411907] [2020-10-28 09:28:07,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:28:07,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:28:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:07,164 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 4 states. [2020-10-28 09:28:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:07,315 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-28 09:28:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:28:07,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-28 09:28:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:07,317 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:28:07,317 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:28:07,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:28:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 09:28:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:28:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-28 09:28:07,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 51 [2020-10-28 09:28:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:07,329 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-28 09:28:07,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:28:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-28 09:28:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:28:07,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:07,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:07,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:28:07,331 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -743514903, now seen corresponding path program 1 times [2020-10-28 09:28:07,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:07,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599964422] [2020-10-28 09:28:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:28:07,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:07,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-28 09:28:07,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:28:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:28:07,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:07,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:28:07,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:07,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:28:07,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:07,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:28:07,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599964422] [2020-10-28 09:28:07,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:07,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:28:07,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056381783] [2020-10-28 09:28:07,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:28:07,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:28:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:07,762 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 4 states. [2020-10-28 09:28:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:07,910 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-28 09:28:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:28:07,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-28 09:28:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:07,912 INFO L225 Difference]: With dead ends: 79 [2020-10-28 09:28:07,912 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:28:07,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:28:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 09:28:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:28:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-28 09:28:07,923 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 51 [2020-10-28 09:28:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-28 09:28:07,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:28:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-28 09:28:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:28:07,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:07,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:28:07,926 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1250629803, now seen corresponding path program 1 times [2020-10-28 09:28:07,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721583891] [2020-10-28 09:28:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:08,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:28:08,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:08,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 09:28:08,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:08,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:28:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:28:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:08,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:08,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:08,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:08,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:08,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:28:08,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721583891] [2020-10-28 09:28:08,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:08,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:28:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413097963] [2020-10-28 09:28:08,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:28:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:28:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:08,498 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 4 states. [2020-10-28 09:28:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:08,644 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-28 09:28:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:28:08,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-28 09:28:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:08,646 INFO L225 Difference]: With dead ends: 97 [2020-10-28 09:28:08,646 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:28:08,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:28:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 09:28:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:28:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-28 09:28:08,657 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 51 [2020-10-28 09:28:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:08,657 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-28 09:28:08,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:28:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-28 09:28:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:28:08,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:08,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:08,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:28:08,659 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1644996589, now seen corresponding path program 1 times [2020-10-28 09:28:08,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:08,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771206495] [2020-10-28 09:28:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:12,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:28:13,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:28:13,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 09:28:13,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:28:13,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 09:28:13,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:13,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:13,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:13,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:28:13,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771206495] [2020-10-28 09:28:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 09:28:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188632354] [2020-10-28 09:28:13,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:28:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:28:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:28:13,829 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-10-28 09:28:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:14,069 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-28 09:28:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:28:14,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-28 09:28:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:14,071 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:28:14,071 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:28:14,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:28:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:28:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-28 09:28:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:28:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-28 09:28:14,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 51 [2020-10-28 09:28:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:14,081 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-28 09:28:14,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:28:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-28 09:28:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:28:14,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:14,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:14,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:28:14,083 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1702254891, now seen corresponding path program 1 times [2020-10-28 09:28:14,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:14,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907652133] [2020-10-28 09:28:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:15,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:19,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:19,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:28:19,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:28:19,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:28:19,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:19,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:28:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:28:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:28:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:28:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:20,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:20,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:28:20,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:28:20,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907652133] [2020-10-28 09:28:20,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:20,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:28:20,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112378120] [2020-10-28 09:28:20,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:28:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:28:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:28:20,071 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 13 states. [2020-10-28 09:28:20,753 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 09:28:21,069 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-28 09:28:21,458 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-28 09:28:21,685 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-28 09:28:21,848 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-28 09:28:22,065 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-28 09:28:22,578 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-28 09:28:22,805 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 09:28:23,199 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-28 09:28:23,452 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-28 09:28:23,902 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-28 09:28:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:24,094 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2020-10-28 09:28:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:28:24,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 09:28:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:24,104 INFO L225 Difference]: With dead ends: 156 [2020-10-28 09:28:24,104 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 09:28:24,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:28:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 09:28:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2020-10-28 09:28:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 09:28:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-10-28 09:28:24,157 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 51 [2020-10-28 09:28:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:24,157 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-10-28 09:28:24,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:28:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-10-28 09:28:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:28:24,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:24,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:24,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:28:24,160 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1766432719, now seen corresponding path program 1 times [2020-10-28 09:28:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519504693] [2020-10-28 09:28:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:24,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:27,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:28,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:28,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:29,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:29,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:28:29,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:28:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:28:29,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:29,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:28:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:28:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:28:29,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:30,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:30,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:30,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:30,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:30,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:30,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:30,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:30,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:30,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:28:30,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:30,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:30,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:28:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:30,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:30,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:30,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:28:30,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:30,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:28:30,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519504693] [2020-10-28 09:28:30,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:30,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:28:30,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698386564] [2020-10-28 09:28:30,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:28:30,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:28:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:28:30,439 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 15 states. [2020-10-28 09:28:33,090 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-28 09:28:33,228 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 09:28:33,763 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-28 09:28:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:34,429 INFO L93 Difference]: Finished difference Result 280 states and 340 transitions. [2020-10-28 09:28:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:28:34,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-28 09:28:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:34,437 INFO L225 Difference]: With dead ends: 280 [2020-10-28 09:28:34,437 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 09:28:34,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:28:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 09:28:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 174. [2020-10-28 09:28:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:28:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2020-10-28 09:28:34,495 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 60 [2020-10-28 09:28:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:34,499 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2020-10-28 09:28:34,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:28:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2020-10-28 09:28:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:28:34,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:34,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:34,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:28:34,510 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:34,510 INFO L82 PathProgramCache]: Analyzing trace with hash -78934447, now seen corresponding path program 1 times [2020-10-28 09:28:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:34,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461233334] [2020-10-28 09:28:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:34,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:34,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:37,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:38,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:39,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:28:39,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:28:39,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:28:39,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:39,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:28:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:28:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:39,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:39,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:39,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:39,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:39,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:39,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:28:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:39,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:39,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:28:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461233334] [2020-10-28 09:28:39,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:28:39,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:28:39,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678143815] [2020-10-28 09:28:39,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:28:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:28:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:39,625 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand 4 states. [2020-10-28 09:28:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:39,791 INFO L93 Difference]: Finished difference Result 251 states and 303 transitions. [2020-10-28 09:28:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:28:39,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 09:28:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:39,795 INFO L225 Difference]: With dead ends: 251 [2020-10-28 09:28:39,795 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:28:39,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:28:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:28:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-28 09:28:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 09:28:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2020-10-28 09:28:39,826 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 60 [2020-10-28 09:28:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:39,826 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2020-10-28 09:28:39,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:28:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2020-10-28 09:28:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:28:39,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:39,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:39,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:28:39,831 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -181812267, now seen corresponding path program 2 times [2020-10-28 09:28:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:39,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893416630] [2020-10-28 09:28:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:41,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:44,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:44,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:28:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:28:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:45,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:45,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:45,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:45,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:45,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:45,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:45,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:28:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893416630] [2020-10-28 09:28:45,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:45,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:28:45,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566187354] [2020-10-28 09:28:45,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:28:45,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:28:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:28:45,049 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand 8 states. [2020-10-28 09:28:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:45,784 INFO L93 Difference]: Finished difference Result 261 states and 308 transitions. [2020-10-28 09:28:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:28:45,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 09:28:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:45,788 INFO L225 Difference]: With dead ends: 261 [2020-10-28 09:28:45,788 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:28:45,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:28:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:28:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2020-10-28 09:28:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 09:28:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2020-10-28 09:28:45,824 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 67 [2020-10-28 09:28:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:45,826 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2020-10-28 09:28:45,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:28:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2020-10-28 09:28:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:28:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:45,828 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 09:28:45,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:28:45,829 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1764650581, now seen corresponding path program 2 times [2020-10-28 09:28:45,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:45,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809304947] [2020-10-28 09:28:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:46,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:47,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:48,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:48,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:28:50,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 09:28:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:51,540 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-10-28 09:28:51,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:51,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:51,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:51,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:51,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:28:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:51,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:28:51,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:51,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:28:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:51,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:28:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:51,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:51,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:51,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:28:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809304947] [2020-10-28 09:28:52,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:52,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:28:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384537857] [2020-10-28 09:28:52,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:28:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:28:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:28:52,040 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand 15 states. [2020-10-28 09:28:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:55,028 INFO L93 Difference]: Finished difference Result 250 states and 297 transitions. [2020-10-28 09:28:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:28:55,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-28 09:28:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:55,032 INFO L225 Difference]: With dead ends: 250 [2020-10-28 09:28:55,032 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 09:28:55,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:28:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 09:28:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2020-10-28 09:28:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 09:28:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 193 transitions. [2020-10-28 09:28:55,066 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 193 transitions. Word has length 69 [2020-10-28 09:28:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:55,066 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 193 transitions. [2020-10-28 09:28:55,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:28:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 193 transitions. [2020-10-28 09:28:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:28:55,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:55,068 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 09:28:55,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:28:55,068 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1516504087, now seen corresponding path program 1 times [2020-10-28 09:28:55,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:55,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15188241] [2020-10-28 09:28:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:55,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:00,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:00,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:29:00,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:29:00,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:29:00,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:00,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:00,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:00,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:00,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:29:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:00,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:00,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:00,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:00,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:00,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:29:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:00,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:00,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:00,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:00,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:00,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:00,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:29:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:00,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:00,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:00,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:00,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:00,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 09:29:00,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15188241] [2020-10-28 09:29:00,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:29:00,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:29:00,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593631927] [2020-10-28 09:29:00,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:29:00,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:29:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:29:00,184 INFO L87 Difference]: Start difference. First operand 170 states and 193 transitions. Second operand 4 states. [2020-10-28 09:29:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:00,384 INFO L93 Difference]: Finished difference Result 245 states and 279 transitions. [2020-10-28 09:29:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:29:00,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 09:29:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:00,387 INFO L225 Difference]: With dead ends: 245 [2020-10-28 09:29:00,387 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:29:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:29:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:29:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 09:29:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:29:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-10-28 09:29:00,422 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 69 [2020-10-28 09:29:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:00,423 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-10-28 09:29:00,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:29:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-10-28 09:29:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:29:00,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:00,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 09:29:00,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:29:00,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1536210608, now seen corresponding path program 3 times [2020-10-28 09:29:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:00,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25591807] [2020-10-28 09:29:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:00,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:06,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5628 [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:06,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:29:06,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:29:06,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 09:29:06,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:08,040 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-28 09:29:08,237 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 26 [2020-10-28 09:29:08,390 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2020-10-28 09:29:08,663 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2020-10-28 09:29:08,827 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-10-28 09:29:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:29:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:10,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:29:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:29:10,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:10,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:29:10,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25591807] [2020-10-28 09:29:10,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:10,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:29:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516424508] [2020-10-28 09:29:10,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:29:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:29:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:29:10,099 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 17 states. [2020-10-28 09:29:11,846 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-28 09:29:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:15,461 INFO L93 Difference]: Finished difference Result 275 states and 317 transitions. [2020-10-28 09:29:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:29:15,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-28 09:29:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:15,465 INFO L225 Difference]: With dead ends: 275 [2020-10-28 09:29:15,466 INFO L226 Difference]: Without dead ends: 258 [2020-10-28 09:29:15,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:29:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-28 09:29:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 181. [2020-10-28 09:29:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 09:29:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2020-10-28 09:29:15,509 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 71 [2020-10-28 09:29:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:15,509 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2020-10-28 09:29:15,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:29:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2020-10-28 09:29:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:29:15,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:15,511 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 09:29:15,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:29:15,511 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1010436273, now seen corresponding path program 3 times [2020-10-28 09:29:15,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:15,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623237259] [2020-10-28 09:29:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:15,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:15,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:15,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:15,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:16,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:16,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:16,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:29:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:29:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:29:20,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:21,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:21,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:21,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:21,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:21,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:29:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:21,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:29:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:21,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:21,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:29:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:21,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:21,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:21,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:21,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:29:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:21,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:21,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:21,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:29:21,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:21,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:21,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:29:21,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623237259] [2020-10-28 09:29:21,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:21,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:29:21,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441066989] [2020-10-28 09:29:21,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:29:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:29:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:29:21,781 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand 16 states. [2020-10-28 09:29:23,199 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-28 09:29:23,358 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 09:29:23,623 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-28 09:29:23,799 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-28 09:29:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:25,265 INFO L93 Difference]: Finished difference Result 222 states and 257 transitions. [2020-10-28 09:29:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:29:25,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-10-28 09:29:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:25,273 INFO L225 Difference]: With dead ends: 222 [2020-10-28 09:29:25,273 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 09:29:25,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:29:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 09:29:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2020-10-28 09:29:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:29:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2020-10-28 09:29:25,308 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 78 [2020-10-28 09:29:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:25,308 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2020-10-28 09:29:25,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:29:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2020-10-28 09:29:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:29:25,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:25,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:25,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:29:25,310 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1443100342, now seen corresponding path program 4 times [2020-10-28 09:29:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728440231] [2020-10-28 09:29:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:26,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:27,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:29:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:29:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:30,951 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2020-10-28 09:29:31,145 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-28 09:29:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:32,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:32,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:29:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:32,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:32,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:32,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:29:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:32,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:32,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:29:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728440231] [2020-10-28 09:29:32,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:32,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:29:32,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277636359] [2020-10-28 09:29:32,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:29:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:29:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:29:32,263 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand 17 states. [2020-10-28 09:29:32,687 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-28 09:29:33,010 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-28 09:29:33,274 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 09:29:34,021 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 09:29:34,347 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-28 09:29:34,534 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-28 09:29:34,734 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-28 09:29:35,242 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-28 09:29:35,822 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-28 09:29:36,050 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-28 09:29:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:36,662 INFO L93 Difference]: Finished difference Result 271 states and 317 transitions. [2020-10-28 09:29:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:29:36,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-28 09:29:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:36,666 INFO L225 Difference]: With dead ends: 271 [2020-10-28 09:29:36,666 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 09:29:36,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:29:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 09:29:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 224. [2020-10-28 09:29:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 09:29:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2020-10-28 09:29:36,709 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 80 [2020-10-28 09:29:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:36,709 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2020-10-28 09:29:36,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:29:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2020-10-28 09:29:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 09:29:36,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:36,711 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 09:29:36,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:29:36,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1644145195, now seen corresponding path program 5 times [2020-10-28 09:29:36,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:36,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800743061] [2020-10-28 09:29:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:39,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 09:29:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:42,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:29:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:29:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:42,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:42,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:29:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:42,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:42,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:29:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:42,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:42,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:42,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:29:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:42,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 09:29:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800743061] [2020-10-28 09:29:42,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:42,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:29:42,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397363833] [2020-10-28 09:29:42,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:29:42,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:29:42,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:29:42,448 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand 19 states. [2020-10-28 09:29:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:45,106 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2020-10-28 09:29:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:29:45,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-28 09:29:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:45,111 INFO L225 Difference]: With dead ends: 270 [2020-10-28 09:29:45,111 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 09:29:45,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:29:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 09:29:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2020-10-28 09:29:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 09:29:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 270 transitions. [2020-10-28 09:29:45,159 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 270 transitions. Word has length 87 [2020-10-28 09:29:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:45,159 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 270 transitions. [2020-10-28 09:29:45,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:29:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 270 transitions. [2020-10-28 09:29:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 09:29:45,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:45,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:45,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:29:45,161 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:45,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1652815610, now seen corresponding path program 4 times [2020-10-28 09:29:45,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:45,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836337089] [2020-10-28 09:29:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:59,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:59,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:29:59,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:29:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14638 [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:29:59,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:00,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:30:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:00,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:00,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:30:00,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:00,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:30:00,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:00,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:30:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:30:00,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:00,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:30:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:30:00,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:00,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:30:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:30:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 09:30:00,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836337089] [2020-10-28 09:30:00,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:30:00,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:30:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60510367] [2020-10-28 09:30:00,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:30:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:30:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:30:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:30:00,131 INFO L87 Difference]: Start difference. First operand 234 states and 270 transitions. Second operand 10 states. [2020-10-28 09:30:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:30:01,610 INFO L93 Difference]: Finished difference Result 453 states and 529 transitions. [2020-10-28 09:30:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:30:01,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-10-28 09:30:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:30:01,616 INFO L225 Difference]: With dead ends: 453 [2020-10-28 09:30:01,616 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 09:30:01,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:30:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 09:30:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 229. [2020-10-28 09:30:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 09:30:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 259 transitions. [2020-10-28 09:30:01,664 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 259 transitions. Word has length 87 [2020-10-28 09:30:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:30:01,664 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 259 transitions. [2020-10-28 09:30:01,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:30:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 259 transitions. [2020-10-28 09:30:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:30:01,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:30:01,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 09:30:01,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:30:01,666 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:30:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:30:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2098111120, now seen corresponding path program 6 times [2020-10-28 09:30:01,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:30:01,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990303829] [2020-10-28 09:30:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:30:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:03,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:04,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:04,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:06,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:06,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 09:30:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:07,434 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-10-28 09:30:07,956 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-28 09:30:08,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:30:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:08,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:08,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:30:08,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:30:08,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:30:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:08,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:08,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:08,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:08,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:30:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:08,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:08,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:08,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:30:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:30:08,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990303829] [2020-10-28 09:30:08,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:30:08,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:30:08,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407663662] [2020-10-28 09:30:08,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:30:08,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:30:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:30:08,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:30:08,643 INFO L87 Difference]: Start difference. First operand 229 states and 259 transitions. Second operand 19 states. [2020-10-28 09:30:11,062 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 09:30:11,223 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-28 09:30:12,236 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-28 09:30:12,515 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-28 09:30:12,706 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-28 09:30:13,075 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-28 09:30:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:30:15,477 INFO L93 Difference]: Finished difference Result 312 states and 361 transitions. [2020-10-28 09:30:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 09:30:15,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-28 09:30:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:30:15,481 INFO L225 Difference]: With dead ends: 312 [2020-10-28 09:30:15,481 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 09:30:15,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=519, Invalid=2903, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:30:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 09:30:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 234. [2020-10-28 09:30:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 09:30:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2020-10-28 09:30:15,543 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 89 [2020-10-28 09:30:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:30:15,543 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2020-10-28 09:30:15,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:30:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2020-10-28 09:30:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:30:15,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:30:15,545 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 09:30:15,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:30:15,548 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:30:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:30:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1280610609, now seen corresponding path program 7 times [2020-10-28 09:30:15,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:30:15,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629192460] [2020-10-28 09:30:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:30:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:15,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:15,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:15,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:15,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:30:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:30:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 09:30:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:30:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:30:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:30:20,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 09:30:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:30:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:30:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:30:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:30:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:30:20,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-28 09:30:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:30:20,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:30:20,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:30:20,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:30:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-28 09:30:20,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629192460] [2020-10-28 09:30:20,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:30:20,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:30:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261356920] [2020-10-28 09:30:20,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:30:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:30:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:30:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:30:20,965 INFO L87 Difference]: Start difference. First operand 234 states and 265 transitions. Second operand 13 states. [2020-10-28 09:30:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:30:22,296 INFO L93 Difference]: Finished difference Result 257 states and 293 transitions. [2020-10-28 09:30:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:30:22,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-10-28 09:30:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:30:22,299 INFO L225 Difference]: With dead ends: 257 [2020-10-28 09:30:22,299 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:30:22,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:30:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:30:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2020-10-28 09:30:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 09:30:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2020-10-28 09:30:22,334 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 96 [2020-10-28 09:30:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:30:22,335 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2020-10-28 09:30:22,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:30:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2020-10-28 09:30:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:30:22,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:30:22,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 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 09:30:22,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:30:22,337 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:30:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:30:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1112731893, now seen corresponding path program 5 times [2020-10-28 09:30:22,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:30:22,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903241563] [2020-10-28 09:30:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:30:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:30:22,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:30:32,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:30:32,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 09:30:32,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:30:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9967 [2020-10-28 09:30:32,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:30:32,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:30:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:30:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:30:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 09:30:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0