/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:37:46,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:37:46,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:37:46,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:37:46,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:37:46,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:37:46,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:37:46,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:37:46,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:37:46,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:37:46,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:37:46,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:37:46,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:37:46,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:37:46,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:37:46,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:37:46,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:37:46,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:37:46,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:37:46,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:37:46,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:37:46,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:37:46,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:37:46,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:37:46,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:37:46,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:37:46,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:37:46,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:37:46,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:37:46,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:37:46,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:37:46,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:37:46,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:37:46,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:37:46,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:37:46,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:37:46,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:37:46,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:37:46,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:37:46,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:37:46,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:37:46,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:37:46,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:37:46,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:37:46,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:37:46,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:37:46,633 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:37:46,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:37:46,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:37:46,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:37:46,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:37:46,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:37:46,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:37:46,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:37:46,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:37:46,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:37:46,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:37:46,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:37:46,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:37:46,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:37:46,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:37:46,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:37:46,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:37:46,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:37:46,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:37:46,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:37:46,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:37:46,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:37:46,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:37:46,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:37:46,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:37:46,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:37:47,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:37:47,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:37:47,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:37:47,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:37:47,116 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:37:47,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-27 20:37:47,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f38f7af/b9fe0a0fc8994d808d3939e752345825/FLAG315eae5f1 [2020-10-27 20:37:47,958 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:37:47,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-27 20:37:47,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f38f7af/b9fe0a0fc8994d808d3939e752345825/FLAG315eae5f1 [2020-10-27 20:37:48,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f38f7af/b9fe0a0fc8994d808d3939e752345825 [2020-10-27 20:37:48,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:37:48,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:37:48,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:48,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:37:48,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:37:48,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4a0342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48, skipping insertion in model container [2020-10-27 20:37:48,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:37:48,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:37:48,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:48,541 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:37:48,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:48,658 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:37:48,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48 WrapperNode [2020-10-27 20:37:48,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:48,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:37:48,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:37:48,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:37:48,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:37:48,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:37:48,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:37:48,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:37:48,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:37:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:37:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:37:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:37:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:37:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:37:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:37:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:37:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:37:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:37:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 20:37:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:37:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:37:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:37:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:37:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:37:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:37:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:37:49,401 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:37:49,401 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 20:37:49,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:49 BoogieIcfgContainer [2020-10-27 20:37:49,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:37:49,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:37:49,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:37:49,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:37:49,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:37:48" (1/3) ... [2020-10-27 20:37:49,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f3777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:49, skipping insertion in model container [2020-10-27 20:37:49,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (2/3) ... [2020-10-27 20:37:49,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f3777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:49, skipping insertion in model container [2020-10-27 20:37:49,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:49" (3/3) ... [2020-10-27 20:37:49,414 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-27 20:37:49,428 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:37:49,434 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:37:49,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:37:49,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:37:49,484 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:37:49,484 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:37:49,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:37:49,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:37:49,485 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:37:49,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:37:49,485 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:37:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-27 20:37:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:37:49,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:49,514 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] [2020-10-27 20:37:49,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:49,522 INFO L82 PathProgramCache]: Analyzing trace with hash 620530695, now seen corresponding path program 1 times [2020-10-27 20:37:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:49,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326005416] [2020-10-27 20:37:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:49,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:50,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:37:50,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:37:50,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 20:37:50,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:37:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:50,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:37:50,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:50,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:50,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:50,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:50,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:37:50,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:50,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326005416] [2020-10-27 20:37:50,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:50,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:37:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890898153] [2020-10-27 20:37:50,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:37:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:37:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:37:50,841 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-27 20:37:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:51,007 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2020-10-27 20:37:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:37:51,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-27 20:37:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:51,018 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:37:51,018 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:37:51,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:37:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:37:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 20:37:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:37:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-27 20:37:51,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-10-27 20:37:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-27 20:37:51,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:37:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-27 20:37:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:37:51,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:51,072 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] [2020-10-27 20:37:51,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:37:51,073 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash 6537277, now seen corresponding path program 1 times [2020-10-27 20:37:51,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:51,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861077184] [2020-10-27 20:37:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:37:51,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:37:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 20:37:51,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:37:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:37:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:37:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:37:51,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:51,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:37:51,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:51,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:51,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:37:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861077184] [2020-10-27 20:37:51,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:51,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:37:51,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492411495] [2020-10-27 20:37:51,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:37:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:37:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:37:51,742 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-10-27 20:37:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:52,049 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-27 20:37:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:37:52,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:37:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:52,053 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:37:52,053 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:37:52,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:37:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-27 20:37:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:37:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-27 20:37:52,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 22 [2020-10-27 20:37:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:52,068 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-27 20:37:52,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:37:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-10-27 20:37:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:37:52,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:52,069 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] [2020-10-27 20:37:52,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:37:52,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 125013462, now seen corresponding path program 1 times [2020-10-27 20:37:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158386397] [2020-10-27 20:37:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:53,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:53,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:37:53,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:37:53,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-27 20:37:53,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:37:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:37:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:37:53,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:53,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:53,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:53,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:53,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:53,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:53,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:37:53,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:53,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158386397] [2020-10-27 20:37:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:37:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116285982] [2020-10-27 20:37:53,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:37:53,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:37:53,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:37:53,852 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 5 states. [2020-10-27 20:37:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:54,000 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2020-10-27 20:37:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:37:54,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 20:37:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:54,002 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:37:54,002 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:37:54,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:37:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:37:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-27 20:37:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:37:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2020-10-27 20:37:54,016 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 28 [2020-10-27 20:37:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:54,016 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2020-10-27 20:37:54,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:37:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2020-10-27 20:37:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:37:54,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:54,018 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] [2020-10-27 20:37:54,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:37:54,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash 835669929, now seen corresponding path program 2 times [2020-10-27 20:37:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:54,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470572627] [2020-10-27 20:37:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:54,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:59,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:37:59,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:37:59,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:37:59,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:37:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:37:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:37:59,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 20:37:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:59,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:59,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:59,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:37:59,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:59,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:37:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:37:59,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470572627] [2020-10-27 20:37:59,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:59,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:37:59,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529891565] [2020-10-27 20:37:59,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:37:59,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:37:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:37:59,177 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 4 states. [2020-10-27 20:37:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:59,301 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2020-10-27 20:37:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:37:59,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:37:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:59,303 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:37:59,303 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:37:59,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:37:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:37:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-27 20:37:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:37:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-27 20:37:59,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 31 [2020-10-27 20:37:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:59,316 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-27 20:37:59,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:37:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-27 20:37:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:37:59,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:59,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:59,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:37:59,318 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 628225711, now seen corresponding path program 1 times [2020-10-27 20:37:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:59,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917334275] [2020-10-27 20:37:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:04,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:04,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:38:04,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:38:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:38:04,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:38:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:38:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:38:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:38:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:04,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:04,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:04,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:38:04,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:38:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917334275] [2020-10-27 20:38:04,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:38:04,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 20:38:04,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161235454] [2020-10-27 20:38:04,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:38:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:04,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:38:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:38:04,751 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 9 states. [2020-10-27 20:38:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:05,042 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2020-10-27 20:38:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:38:05,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 20:38:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:05,044 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:38:05,044 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:38:05,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:38:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-10-27 20:38:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:38:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-27 20:38:05,057 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 32 [2020-10-27 20:38:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:05,057 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-27 20:38:05,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:38:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-27 20:38:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:38:05,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:05,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:05,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:38:05,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash -153881938, now seen corresponding path program 1 times [2020-10-27 20:38:05,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:05,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566739900] [2020-10-27 20:38:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:10,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:10,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:38:10,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:38:10,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:38:10,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:38:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:38:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:38:10,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:10,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:10,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:10,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:10,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:10,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:10,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:38:10,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:10,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:38:10,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566739900] [2020-10-27 20:38:10,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:10,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:38:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850206973] [2020-10-27 20:38:10,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:38:10,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:38:10,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:10,752 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 11 states. [2020-10-27 20:38:14,277 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 50 [2020-10-27 20:38:14,459 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:38:16,927 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-27 20:38:18,636 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-27 20:38:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:23,114 INFO L93 Difference]: Finished difference Result 166 states and 215 transitions. [2020-10-27 20:38:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:38:23,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 20:38:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:23,120 INFO L225 Difference]: With dead ends: 166 [2020-10-27 20:38:23,120 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:38:23,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2020-10-27 20:38:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:38:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 80. [2020-10-27 20:38:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:38:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2020-10-27 20:38:23,157 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 33 [2020-10-27 20:38:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:23,159 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2020-10-27 20:38:23,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:38:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2020-10-27 20:38:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:38:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:23,163 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-27 20:38:23,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:38:23,164 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1511895976, now seen corresponding path program 2 times [2020-10-27 20:38:23,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:23,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587541164] [2020-10-27 20:38:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:27,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:27,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:28,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:38:28,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:38:28,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:38:28,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:38:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:38:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:38:28,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:28,659 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 20:38:28,831 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-27 20:38:29,046 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-27 20:38:29,373 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-27 20:38:29,664 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 57 [2020-10-27 20:38:29,846 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2020-10-27 20:38:30,096 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-27 20:38:30,416 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2020-10-27 20:38:30,609 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-27 20:38:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:31,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:31,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:31,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:38:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587541164] [2020-10-27 20:38:31,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:31,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:38:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987383951] [2020-10-27 20:38:31,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:38:31,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:38:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:38:31,216 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 19 states. [2020-10-27 20:38:33,744 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-27 20:38:34,082 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-27 20:38:34,328 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 20:38:34,612 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 20:38:34,804 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 20:38:35,076 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 20:38:35,643 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-27 20:38:36,324 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 20:38:36,845 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-27 20:38:37,046 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2020-10-27 20:38:39,528 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-27 20:38:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:40,315 INFO L93 Difference]: Finished difference Result 235 states and 309 transitions. [2020-10-27 20:38:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:38:40,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 20:38:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:40,318 INFO L225 Difference]: With dead ends: 235 [2020-10-27 20:38:40,318 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 20:38:40,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:38:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 20:38:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 94. [2020-10-27 20:38:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:38:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-10-27 20:38:40,358 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 42 [2020-10-27 20:38:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:40,359 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-10-27 20:38:40,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:38:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-10-27 20:38:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:38:40,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:40,360 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:38:40,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:38:40,361 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1771954070, now seen corresponding path program 1 times [2020-10-27 20:38:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:40,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225721228] [2020-10-27 20:38:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:40,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:42,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:45,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:45,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:38:45,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:38:45,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:38:45,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:38:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:38:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:38:45,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:45,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:38:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:38:46,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225721228] [2020-10-27 20:38:46,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:46,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:38:46,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322491473] [2020-10-27 20:38:46,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:38:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:38:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:46,016 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 11 states. [2020-10-27 20:38:46,486 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-27 20:38:46,646 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 20:38:46,818 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-27 20:38:47,154 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 20:38:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:47,395 INFO L93 Difference]: Finished difference Result 211 states and 284 transitions. [2020-10-27 20:38:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:38:47,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 20:38:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:47,399 INFO L225 Difference]: With dead ends: 211 [2020-10-27 20:38:47,399 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 20:38:47,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:38:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 20:38:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2020-10-27 20:38:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 20:38:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2020-10-27 20:38:47,436 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 42 [2020-10-27 20:38:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:47,437 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2020-10-27 20:38:47,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:38:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2020-10-27 20:38:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:38:47,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:47,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:38:47,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:38:47,439 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash 183606168, now seen corresponding path program 2 times [2020-10-27 20:38:47,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:47,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363041622] [2020-10-27 20:38:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:48,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:48,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:48,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:49,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:49,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:49,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:52,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:52,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:38:52,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:38:52,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:38:52,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:52,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:38:52,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:38:52,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:38:52,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:53,224 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 20:38:53,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:53,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:53,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:53,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:53,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:53,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363041622] [2020-10-27 20:38:53,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:53,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:38:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227704078] [2020-10-27 20:38:53,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:38:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:38:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:38:53,296 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand 12 states. [2020-10-27 20:38:54,081 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 20:38:54,277 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 20:38:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:54,464 INFO L93 Difference]: Finished difference Result 404 states and 552 transitions. [2020-10-27 20:38:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:38:54,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 20:38:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:54,467 INFO L225 Difference]: With dead ends: 404 [2020-10-27 20:38:54,467 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 20:38:54,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:38:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 20:38:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 265. [2020-10-27 20:38:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 20:38:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 371 transitions. [2020-10-27 20:38:54,532 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 371 transitions. Word has length 42 [2020-10-27 20:38:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:54,532 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 371 transitions. [2020-10-27 20:38:54,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:38:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 371 transitions. [2020-10-27 20:38:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:38:54,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:54,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:38:54,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:38:54,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash 977632986, now seen corresponding path program 3 times [2020-10-27 20:38:54,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:54,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871560742] [2020-10-27 20:38:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:55,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:55,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:59,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:59,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:38:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:00,004 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 20:39:00,281 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-27 20:39:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:00,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:00,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:00,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:00,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:00,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:00,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:00,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:00,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:00,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:00,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:39:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871560742] [2020-10-27 20:39:00,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:00,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:39:00,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971934136] [2020-10-27 20:39:00,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:39:00,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:00,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:39:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:39:00,385 INFO L87 Difference]: Start difference. First operand 265 states and 371 transitions. Second operand 11 states. [2020-10-27 20:39:00,680 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 20:39:00,967 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-27 20:39:01,285 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-27 20:39:01,621 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:39:01,861 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 20:39:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:02,373 INFO L93 Difference]: Finished difference Result 556 states and 766 transitions. [2020-10-27 20:39:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:39:02,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 20:39:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:02,378 INFO L225 Difference]: With dead ends: 556 [2020-10-27 20:39:02,378 INFO L226 Difference]: Without dead ends: 455 [2020-10-27 20:39:02,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:39:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-27 20:39:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 396. [2020-10-27 20:39:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-27 20:39:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 548 transitions. [2020-10-27 20:39:02,453 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 548 transitions. Word has length 42 [2020-10-27 20:39:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:02,453 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 548 transitions. [2020-10-27 20:39:02,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:39:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 548 transitions. [2020-10-27 20:39:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:39:02,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:02,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:39:02,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:39:02,456 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash -33484264, now seen corresponding path program 4 times [2020-10-27 20:39:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:02,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518887029] [2020-10-27 20:39:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:39:07,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:39:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:39:07,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:08,085 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2020-10-27 20:39:10,496 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-10-27 20:39:12,217 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-27 20:39:15,184 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-10-27 20:39:17,844 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-10-27 20:39:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:24,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:24,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:39:24,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518887029] [2020-10-27 20:39:24,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:24,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:39:24,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856672152] [2020-10-27 20:39:24,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:39:24,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:39:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2020-10-27 20:39:24,378 INFO L87 Difference]: Start difference. First operand 396 states and 548 transitions. Second operand 18 states. [2020-10-27 20:39:25,815 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 20:39:29,230 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-27 20:39:32,008 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 20:39:32,472 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 20:39:32,753 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 20:39:35,201 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-27 20:39:40,004 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-27 20:39:40,677 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2020-10-27 20:39:46,168 WARN L193 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-27 20:39:48,700 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 20:39:51,549 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 20:39:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:51,913 INFO L93 Difference]: Finished difference Result 612 states and 842 transitions. [2020-10-27 20:39:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:39:51,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 20:39:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:51,919 INFO L225 Difference]: With dead ends: 612 [2020-10-27 20:39:51,919 INFO L226 Difference]: Without dead ends: 605 [2020-10-27 20:39:51,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=256, Invalid=930, Unknown=4, NotChecked=0, Total=1190 [2020-10-27 20:39:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-27 20:39:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 437. [2020-10-27 20:39:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-27 20:39:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 607 transitions. [2020-10-27 20:39:52,029 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 607 transitions. Word has length 42 [2020-10-27 20:39:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:52,029 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 607 transitions. [2020-10-27 20:39:52,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:39:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 607 transitions. [2020-10-27 20:39:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:39:52,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:52,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:39:52,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:39:52,031 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -610714916, now seen corresponding path program 5 times [2020-10-27 20:39:52,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375282875] [2020-10-27 20:39:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:53,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:53,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:57,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:39:57,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:39:57,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:39:57,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:39:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:39:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:39:57,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:39:57,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375282875] [2020-10-27 20:39:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:39:57,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937215658] [2020-10-27 20:39:57,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:39:57,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:39:57,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:39:57,186 INFO L87 Difference]: Start difference. First operand 437 states and 607 transitions. Second operand 7 states. [2020-10-27 20:39:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:57,530 INFO L93 Difference]: Finished difference Result 545 states and 747 transitions. [2020-10-27 20:39:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:39:57,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-27 20:39:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:57,533 INFO L225 Difference]: With dead ends: 545 [2020-10-27 20:39:57,534 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 20:39:57,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:39:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 20:39:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 264. [2020-10-27 20:39:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 20:39:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 357 transitions. [2020-10-27 20:39:57,595 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 357 transitions. Word has length 42 [2020-10-27 20:39:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:57,595 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 357 transitions. [2020-10-27 20:39:57,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:39:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 357 transitions. [2020-10-27 20:39:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:39:57,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:57,597 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:39:57,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:39:57,597 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:57,598 INFO L82 PathProgramCache]: Analyzing trace with hash 734113182, now seen corresponding path program 1 times [2020-10-27 20:39:57,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:57,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638375136] [2020-10-27 20:39:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:59,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:02,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:40:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:02,973 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 20:40:03,118 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 20:40:03,257 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-27 20:40:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:03,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:03,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:03,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:03,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:03,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:03,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:40:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638375136] [2020-10-27 20:40:03,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:03,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:40:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484831737] [2020-10-27 20:40:03,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:40:03,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:40:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:40:03,351 INFO L87 Difference]: Start difference. First operand 264 states and 357 transitions. Second operand 11 states. [2020-10-27 20:40:03,995 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 20:40:04,253 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:40:05,074 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 20:40:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:05,255 INFO L93 Difference]: Finished difference Result 326 states and 435 transitions. [2020-10-27 20:40:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:40:05,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-27 20:40:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:05,258 INFO L225 Difference]: With dead ends: 326 [2020-10-27 20:40:05,258 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 20:40:05,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:40:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 20:40:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 298. [2020-10-27 20:40:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-27 20:40:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 399 transitions. [2020-10-27 20:40:05,324 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 399 transitions. Word has length 43 [2020-10-27 20:40:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:05,324 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 399 transitions. [2020-10-27 20:40:05,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:40:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 399 transitions. [2020-10-27 20:40:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:40:05,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:05,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:40:05,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:40:05,326 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash 992278620, now seen corresponding path program 1 times [2020-10-27 20:40:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:05,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881155156] [2020-10-27 20:40:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:05,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:05,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:05,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:40:05,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:40:05,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:05,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:05,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:05,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:05,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:05,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:40:05,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881155156] [2020-10-27 20:40:05,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:05,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:40:05,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061825248] [2020-10-27 20:40:05,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:40:05,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:05,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:40:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:40:05,853 INFO L87 Difference]: Start difference. First operand 298 states and 399 transitions. Second operand 9 states. [2020-10-27 20:40:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:06,439 INFO L93 Difference]: Finished difference Result 490 states and 659 transitions. [2020-10-27 20:40:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:40:06,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-27 20:40:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:06,443 INFO L225 Difference]: With dead ends: 490 [2020-10-27 20:40:06,444 INFO L226 Difference]: Without dead ends: 483 [2020-10-27 20:40:06,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:40:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-27 20:40:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 410. [2020-10-27 20:40:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-27 20:40:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 554 transitions. [2020-10-27 20:40:06,526 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 554 transitions. Word has length 43 [2020-10-27 20:40:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:06,527 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 554 transitions. [2020-10-27 20:40:06,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:40:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 554 transitions. [2020-10-27 20:40:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:40:06,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:06,529 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:40:06,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:40:06,529 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash -287585058, now seen corresponding path program 1 times [2020-10-27 20:40:06,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:06,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665359937] [2020-10-27 20:40:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:06,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:06,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:06,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:11,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:11,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:40:11,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:40:11,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:40:11,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:40:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:40:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:40:11,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:12,074 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-27 20:40:12,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:12,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:12,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:12,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:40:12,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665359937] [2020-10-27 20:40:12,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:12,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:40:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014449477] [2020-10-27 20:40:12,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:40:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:40:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:40:12,152 INFO L87 Difference]: Start difference. First operand 410 states and 554 transitions. Second operand 11 states. [2020-10-27 20:40:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:13,403 INFO L93 Difference]: Finished difference Result 835 states and 1129 transitions. [2020-10-27 20:40:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:40:13,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-27 20:40:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:13,406 INFO L225 Difference]: With dead ends: 835 [2020-10-27 20:40:13,407 INFO L226 Difference]: Without dead ends: 602 [2020-10-27 20:40:13,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:40:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-27 20:40:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 426. [2020-10-27 20:40:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-27 20:40:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 577 transitions. [2020-10-27 20:40:13,508 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 577 transitions. Word has length 43 [2020-10-27 20:40:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:13,509 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 577 transitions. [2020-10-27 20:40:13,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:40:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 577 transitions. [2020-10-27 20:40:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:13,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:13,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:40:13,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:40:13,511 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1365316482, now seen corresponding path program 1 times [2020-10-27 20:40:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294374963] [2020-10-27 20:40:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:14,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:15,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:15,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:15,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:18,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:40:18,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:18,996 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-10-27 20:40:19,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:19,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:19,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:19,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:40:19,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294374963] [2020-10-27 20:40:19,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:19,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:40:19,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205761164] [2020-10-27 20:40:19,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:40:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:40:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:40:19,103 INFO L87 Difference]: Start difference. First operand 426 states and 577 transitions. Second operand 11 states. [2020-10-27 20:40:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:19,970 INFO L93 Difference]: Finished difference Result 745 states and 1006 transitions. [2020-10-27 20:40:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:40:19,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 20:40:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:19,976 INFO L225 Difference]: With dead ends: 745 [2020-10-27 20:40:19,976 INFO L226 Difference]: Without dead ends: 738 [2020-10-27 20:40:19,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:40:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-27 20:40:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 614. [2020-10-27 20:40:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-10-27 20:40:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 834 transitions. [2020-10-27 20:40:20,154 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 834 transitions. Word has length 45 [2020-10-27 20:40:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:20,154 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 834 transitions. [2020-10-27 20:40:20,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:40:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 834 transitions. [2020-10-27 20:40:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:20,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:20,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:40:20,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:40:20,157 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1107151044, now seen corresponding path program 1 times [2020-10-27 20:40:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:20,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934478984] [2020-10-27 20:40:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:20,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:21,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:23,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:24,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:25,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:25,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:25,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:25,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 20:40:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:40:25,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:40:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:40:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:40:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:25,568 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-27 20:40:25,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:25,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:25,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:40:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934478984] [2020-10-27 20:40:25,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:25,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:40:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97303073] [2020-10-27 20:40:25,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:40:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:40:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:40:25,821 INFO L87 Difference]: Start difference. First operand 614 states and 834 transitions. Second operand 11 states. [2020-10-27 20:40:26,274 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 20:40:26,440 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-27 20:40:26,642 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-27 20:40:27,067 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 20:40:27,346 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 20:40:27,670 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-27 20:40:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:27,917 INFO L93 Difference]: Finished difference Result 747 states and 1002 transitions. [2020-10-27 20:40:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:40:27,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 20:40:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:27,920 INFO L225 Difference]: With dead ends: 747 [2020-10-27 20:40:27,921 INFO L226 Difference]: Without dead ends: 710 [2020-10-27 20:40:27,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:40:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-27 20:40:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 668. [2020-10-27 20:40:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-10-27 20:40:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 906 transitions. [2020-10-27 20:40:28,087 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 906 transitions. Word has length 45 [2020-10-27 20:40:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:28,088 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 906 transitions. [2020-10-27 20:40:28,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:40:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 906 transitions. [2020-10-27 20:40:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:28,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:28,090 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:40:28,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:40:28,090 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash 557911552, now seen corresponding path program 1 times [2020-10-27 20:40:28,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:28,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844549320] [2020-10-27 20:40:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:28,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:29,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:29,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:33,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:40:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:33,692 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 28 [2020-10-27 20:40:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:34,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:34,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:34,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:40:34,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:34,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:40:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:40:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844549320] [2020-10-27 20:40:34,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:34,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:40:34,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714408789] [2020-10-27 20:40:34,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:40:34,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:40:34,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:40:34,066 INFO L87 Difference]: Start difference. First operand 668 states and 906 transitions. Second operand 13 states. [2020-10-27 20:40:35,073 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-27 20:40:35,355 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 20:40:35,790 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-27 20:40:35,937 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 20:40:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:36,819 INFO L93 Difference]: Finished difference Result 1131 states and 1521 transitions. [2020-10-27 20:40:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:40:36,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 20:40:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:36,824 INFO L225 Difference]: With dead ends: 1131 [2020-10-27 20:40:36,824 INFO L226 Difference]: Without dead ends: 1025 [2020-10-27 20:40:36,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:40:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2020-10-27 20:40:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 980. [2020-10-27 20:40:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2020-10-27 20:40:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1320 transitions. [2020-10-27 20:40:37,056 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1320 transitions. Word has length 45 [2020-10-27 20:40:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:37,056 INFO L481 AbstractCegarLoop]: Abstraction has 980 states and 1320 transitions. [2020-10-27 20:40:37,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:40:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1320 transitions. [2020-10-27 20:40:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:37,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:37,059 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:40:37,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:40:37,059 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash -463786688, now seen corresponding path program 1 times [2020-10-27 20:40:37,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:37,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699046849] [2020-10-27 20:40:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:39,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:39,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:40,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:42,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:42,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:42,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 20:40:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:40:42,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:40:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:40:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:40:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:42,554 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2020-10-27 20:40:42,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:42,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:40:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699046849] [2020-10-27 20:40:42,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:42,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:40:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495897057] [2020-10-27 20:40:42,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:40:42,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:40:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:40:42,933 INFO L87 Difference]: Start difference. First operand 980 states and 1320 transitions. Second operand 13 states. [2020-10-27 20:40:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:44,528 INFO L93 Difference]: Finished difference Result 1822 states and 2447 transitions. [2020-10-27 20:40:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:40:44,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 20:40:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:44,536 INFO L225 Difference]: With dead ends: 1822 [2020-10-27 20:40:44,536 INFO L226 Difference]: Without dead ends: 1680 [2020-10-27 20:40:44,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:40:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2020-10-27 20:40:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1119. [2020-10-27 20:40:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-10-27 20:40:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1513 transitions. [2020-10-27 20:40:44,875 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1513 transitions. Word has length 45 [2020-10-27 20:40:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:44,876 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1513 transitions. [2020-10-27 20:40:44,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:40:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1513 transitions. [2020-10-27 20:40:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:44,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:40:44,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:40:44,879 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 423898046, now seen corresponding path program 1 times [2020-10-27 20:40:44,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973313602] [2020-10-27 20:40:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:47,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:49,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:40:49,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:40:49,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:50,365 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-27 20:40:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:50,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:50,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:50,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:50,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:40:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973313602] [2020-10-27 20:40:50,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:50,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:40:50,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184135871] [2020-10-27 20:40:50,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:40:50,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:40:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:40:50,449 INFO L87 Difference]: Start difference. First operand 1119 states and 1513 transitions. Second operand 10 states. [2020-10-27 20:40:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:51,499 INFO L93 Difference]: Finished difference Result 1797 states and 2417 transitions. [2020-10-27 20:40:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:40:51,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-27 20:40:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:51,505 INFO L225 Difference]: With dead ends: 1797 [2020-10-27 20:40:51,505 INFO L226 Difference]: Without dead ends: 1571 [2020-10-27 20:40:51,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:40:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2020-10-27 20:40:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1126. [2020-10-27 20:40:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2020-10-27 20:40:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1508 transitions. [2020-10-27 20:40:51,817 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1508 transitions. Word has length 45 [2020-10-27 20:40:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:51,818 INFO L481 AbstractCegarLoop]: Abstraction has 1126 states and 1508 transitions. [2020-10-27 20:40:51,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:40:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1508 transitions. [2020-10-27 20:40:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:40:51,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:51,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 20:40:51,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:40:51,821 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -855965632, now seen corresponding path program 1 times [2020-10-27 20:40:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:51,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925452227] [2020-10-27 20:40:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:52,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:40:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:57,427 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2020-10-27 20:40:57,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:40:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:40:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:40:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:40:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925452227] [2020-10-27 20:40:57,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:40:57,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:40:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148014468] [2020-10-27 20:40:57,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:40:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:40:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:40:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:40:57,509 INFO L87 Difference]: Start difference. First operand 1126 states and 1508 transitions. Second operand 12 states. [2020-10-27 20:40:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:59,009 INFO L93 Difference]: Finished difference Result 1807 states and 2406 transitions. [2020-10-27 20:40:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:40:59,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 20:40:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:59,015 INFO L225 Difference]: With dead ends: 1807 [2020-10-27 20:40:59,015 INFO L226 Difference]: Without dead ends: 1578 [2020-10-27 20:40:59,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:40:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-10-27 20:40:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1282. [2020-10-27 20:40:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-10-27 20:40:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1705 transitions. [2020-10-27 20:40:59,392 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1705 transitions. Word has length 45 [2020-10-27 20:40:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:59,392 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1705 transitions. [2020-10-27 20:40:59,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:40:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1705 transitions. [2020-10-27 20:40:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:40:59,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:59,402 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:40:59,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:40:59,402 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -547583339, now seen corresponding path program 1 times [2020-10-27 20:40:59,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:59,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749919360] [2020-10-27 20:40:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:59,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:01,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:04,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:04,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:41:04,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:41:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:41:04,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:04,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:41:04,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:41:04,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:41:04,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:41:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:41:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:41:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:41:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 20:41:05,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749919360] [2020-10-27 20:41:05,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:41:05,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:41:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374054949] [2020-10-27 20:41:05,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:41:05,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:41:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:41:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:41:05,271 INFO L87 Difference]: Start difference. First operand 1282 states and 1705 transitions. Second operand 13 states. [2020-10-27 20:41:05,862 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 20:41:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:41:09,549 INFO L93 Difference]: Finished difference Result 2520 states and 3333 transitions. [2020-10-27 20:41:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:41:09,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-27 20:41:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:41:09,560 INFO L225 Difference]: With dead ends: 2520 [2020-10-27 20:41:09,560 INFO L226 Difference]: Without dead ends: 2510 [2020-10-27 20:41:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:41:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2020-10-27 20:41:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1351. [2020-10-27 20:41:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1351 states. [2020-10-27 20:41:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1791 transitions. [2020-10-27 20:41:10,029 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1791 transitions. Word has length 46 [2020-10-27 20:41:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:41:10,029 INFO L481 AbstractCegarLoop]: Abstraction has 1351 states and 1791 transitions. [2020-10-27 20:41:10,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:41:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1791 transitions. [2020-10-27 20:41:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:41:10,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:41:10,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 20:41:10,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:41:10,033 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:41:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:41:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -483368987, now seen corresponding path program 2 times [2020-10-27 20:41:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:41:10,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500496826] [2020-10-27 20:41:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:41:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:10,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:11,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:11,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:12,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:15,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:41:15,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:41:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:15,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:41:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:15,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:15,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:15,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:41:15,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:41:15,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500496826] [2020-10-27 20:41:15,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:41:15,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:41:15,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361840138] [2020-10-27 20:41:15,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:41:15,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:41:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:41:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:41:15,153 INFO L87 Difference]: Start difference. First operand 1351 states and 1791 transitions. Second operand 6 states. [2020-10-27 20:41:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:41:15,660 INFO L93 Difference]: Finished difference Result 2316 states and 3063 transitions. [2020-10-27 20:41:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:41:15,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-27 20:41:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:41:15,664 INFO L225 Difference]: With dead ends: 2316 [2020-10-27 20:41:15,665 INFO L226 Difference]: Without dead ends: 996 [2020-10-27 20:41:15,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:41:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-10-27 20:41:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 661. [2020-10-27 20:41:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-10-27 20:41:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 809 transitions. [2020-10-27 20:41:15,877 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 809 transitions. Word has length 48 [2020-10-27 20:41:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:41:15,877 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 809 transitions. [2020-10-27 20:41:15,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:41:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 809 transitions. [2020-10-27 20:41:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:41:15,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:41:15,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-10-27 20:41:15,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:41:15,880 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:41:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:41:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1565030992, now seen corresponding path program 3 times [2020-10-27 20:41:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:41:15,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259182990] [2020-10-27 20:41:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:41:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:15,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:17,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:41:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:41:20,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:21,199 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-27 20:41:21,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:41:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:21,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:41:21,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:41:21,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:41:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:41:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:41:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:41:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:41:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:41:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:41:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 20:41:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259182990] [2020-10-27 20:41:21,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:41:21,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:41:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298438198] [2020-10-27 20:41:21,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:41:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:41:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:41:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:41:21,284 INFO L87 Difference]: Start difference. First operand 661 states and 809 transitions. Second operand 10 states. [2020-10-27 20:41:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:41:21,895 INFO L93 Difference]: Finished difference Result 781 states and 943 transitions. [2020-10-27 20:41:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:41:21,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 20:41:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:41:21,897 INFO L225 Difference]: With dead ends: 781 [2020-10-27 20:41:21,898 INFO L226 Difference]: Without dead ends: 635 [2020-10-27 20:41:21,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:41:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-27 20:41:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2020-10-27 20:41:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-27 20:41:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 779 transitions. [2020-10-27 20:41:22,069 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 779 transitions. Word has length 55 [2020-10-27 20:41:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:41:22,070 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 779 transitions. [2020-10-27 20:41:22,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:41:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 779 transitions. [2020-10-27 20:41:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:41:22,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:41:22,072 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:41:22,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:41:22,072 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:41:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:41:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -29175919, now seen corresponding path program 1 times [2020-10-27 20:41:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:41:22,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688608217] [2020-10-27 20:41:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:41:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:41:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:41:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking...